falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
19557 Commits
32 Branches
745MB
Tree: 10ce919561
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '10ce919561'
${ noResults }
FFmpeg/libswscale/swscale.c

3429 lines
117KB
Raw Blame History 

  1. /*

  2.  * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

  6.  * FFmpeg is free software; you can redistribute it and/or modify

  7.  * it under the terms of the GNU General Public License as published by

  8.  * the Free Software Foundation; either version 2 of the License, or

  9.  * (at your option) any later version.

  10.  *

  11.  * FFmpeg is distributed in the hope that it will be useful,

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  14.  * GNU General Public License for more details.

  15.  *

  16.  * You should have received a copy of the GNU General Public License

  17.  * along with FFmpeg; if not, write to the Free Software

  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  19.  *

  20.  * the C code (not assembly, mmx, ...) of this file can be used

  21.  * under the LGPL license too

  22.  */

  23. 

  24. /*

  25.   supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR32_1, BGR24, BGR16, BGR15, RGB32, RGB32_1, RGB24, Y8/Y800, YVU9/IF09, PAL8

  26.   supported output formats: YV12, I420/IYUV, YUY2, UYVY, {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09

  27.   {BGR,RGB}{1,4,8,15,16} support dithering

  28. 

  29.   unscaled special converters (YV12=I420=IYUV, Y800=Y8)

  30.   YV12 -> {BGR,RGB}{1,4,8,15,16,24,32}

  31.   x -> x

  32.   YUV9 -> YV12

  33.   YUV9/YV12 -> Y800

  34.   Y800 -> YUV9/YV12

  35.   BGR24 -> BGR32 & RGB24 -> RGB32

  36.   BGR32 -> BGR24 & RGB32 -> RGB24

  37.   BGR15 -> BGR16

  38. */

  39. 

  40. /*

  41. tested special converters (most are tested actually, but I did not write it down ...)

  42.  YV12 -> BGR16

  43.  YV12 -> YV12

  44.  BGR15 -> BGR16

  45.  BGR16 -> BGR16

  46.  YVU9 -> YV12

  47. 

  48. untested special converters

  49.   YV12/I420 -> BGR15/BGR24/BGR32 (it is the yuv2rgb stuff, so it should be OK)

  50.   YV12/I420 -> YV12/I420

  51.   YUY2/BGR15/BGR24/BGR32/RGB24/RGB32 -> same format

  52.   BGR24 -> BGR32 & RGB24 -> RGB32

  53.   BGR32 -> BGR24 & RGB32 -> RGB24

  54.   BGR24 -> YV12

  55. */

  56. 

  57. #define _SVID_SOURCE //needed for MAP_ANONYMOUS

  58. #include <inttypes.h>

  59. #include <string.h>

  60. #include <math.h>

  61. #include <stdio.h>

  62. #include <unistd.h>

  63. #include "config.h"

  64. #include <assert.h>

  65. #if HAVE_SYS_MMAN_H

  66. #include <sys/mman.h>

  67. #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)

  68. #define MAP_ANONYMOUS MAP_ANON

  69. #endif

  70. #endif

  71. #if HAVE_VIRTUALALLOC

  72. #define WIN32_LEAN_AND_MEAN

  73. #include <windows.h>

  74. #endif

  75. #include "swscale.h"

  76. #include "swscale_internal.h"

  77. #include "rgb2rgb.h"

  78. #include "libavutil/x86_cpu.h"

  79. #include "libavutil/bswap.h"

  80. 

  81. unsigned swscale_version(void)

  82. {

  83.     return LIBSWSCALE_VERSION_INT;

  84. }

  85. 

  86. #undef MOVNTQ

  87. #undef PAVGB

  88. 

  89. //#undef HAVE_MMX2

  90. //#define HAVE_AMD3DNOW

  91. //#undef HAVE_MMX

  92. //#undef ARCH_X86

  93. //#define WORDS_BIGENDIAN

  94. #define DITHER1XBPP

  95. 

  96. #define FAST_BGR2YV12 // use 7 bit coefficients instead of 15 bit

  97. 

  98. #define RET 0xC3 //near return opcode for x86

  99. 

  100. #ifdef M_PI

  101. #define PI M_PI

  102. #else

  103. #define PI 3.14159265358979323846

  104. #endif

  105. 

  106. #define isSupportedIn(x)    (       \

  107.            (x)==PIX_FMT_YUV420P     \

  108.         || (x)==PIX_FMT_YUVA420P    \

  109.         || (x)==PIX_FMT_YUYV422     \

  110.         || (x)==PIX_FMT_UYVY422     \

  111.         || (x)==PIX_FMT_RGB32       \

  112.         || (x)==PIX_FMT_RGB32_1     \

  113.         || (x)==PIX_FMT_BGR24       \

  114.         || (x)==PIX_FMT_BGR565      \

  115.         || (x)==PIX_FMT_BGR555      \

  116.         || (x)==PIX_FMT_BGR32       \

  117.         || (x)==PIX_FMT_BGR32_1     \

  118.         || (x)==PIX_FMT_RGB24       \

  119.         || (x)==PIX_FMT_RGB565      \

  120.         || (x)==PIX_FMT_RGB555      \

  121.         || (x)==PIX_FMT_GRAY8       \

  122.         || (x)==PIX_FMT_YUV410P     \

  123.         || (x)==PIX_FMT_YUV440P     \

  124.         || (x)==PIX_FMT_GRAY16BE    \

  125.         || (x)==PIX_FMT_GRAY16LE    \

  126.         || (x)==PIX_FMT_YUV444P     \

  127.         || (x)==PIX_FMT_YUV422P     \

  128.         || (x)==PIX_FMT_YUV411P     \

  129.         || (x)==PIX_FMT_PAL8        \

  130.         || (x)==PIX_FMT_BGR8        \

  131.         || (x)==PIX_FMT_RGB8        \

  132.         || (x)==PIX_FMT_BGR4_BYTE   \

  133.         || (x)==PIX_FMT_RGB4_BYTE   \

  134.         || (x)==PIX_FMT_YUV440P     \

  135.         || (x)==PIX_FMT_MONOWHITE   \

  136.         || (x)==PIX_FMT_MONOBLACK   \

  137.         || (x)==PIX_FMT_YUV420PLE   \

  138.         || (x)==PIX_FMT_YUV422PLE   \

  139.         || (x)==PIX_FMT_YUV444PLE   \

  140.         || (x)==PIX_FMT_YUV420PBE   \

  141.         || (x)==PIX_FMT_YUV422PBE   \

  142.         || (x)==PIX_FMT_YUV444PBE   \

  143.     )

  144. #define isSupportedOut(x)   (       \

  145.            (x)==PIX_FMT_YUV420P     \

  146.         || (x)==PIX_FMT_YUVA420P    \

  147.         || (x)==PIX_FMT_YUYV422     \

  148.         || (x)==PIX_FMT_UYVY422     \

  149.         || (x)==PIX_FMT_YUV444P     \

  150.         || (x)==PIX_FMT_YUV422P     \

  151.         || (x)==PIX_FMT_YUV411P     \

  152.         || isRGB(x)                 \

  153.         || isBGR(x)                 \

  154.         || (x)==PIX_FMT_NV12        \

  155.         || (x)==PIX_FMT_NV21        \

  156.         || (x)==PIX_FMT_GRAY16BE    \

  157.         || (x)==PIX_FMT_GRAY16LE    \

  158.         || (x)==PIX_FMT_GRAY8       \

  159.         || (x)==PIX_FMT_YUV410P     \

  160.         || (x)==PIX_FMT_YUV440P     \

  161.         || (x)==PIX_FMT_YUV420PLE   \

  162.         || (x)==PIX_FMT_YUV422PLE   \

  163.         || (x)==PIX_FMT_YUV444PLE   \

  164.         || (x)==PIX_FMT_YUV420PBE   \

  165.         || (x)==PIX_FMT_YUV422PBE   \

  166.         || (x)==PIX_FMT_YUV444PBE   \

  167.     )

  168. #define isPacked(x)         (       \

  169.            (x)==PIX_FMT_PAL8        \

  170.         || (x)==PIX_FMT_YUYV422     \

  171.         || (x)==PIX_FMT_UYVY422     \

  172.         || isRGB(x)                 \

  173.         || isBGR(x)                 \

  174.     )

  175. #define usePal(x)           (       \

  176.            (x)==PIX_FMT_PAL8        \

  177.         || (x)==PIX_FMT_BGR4_BYTE   \

  178.         || (x)==PIX_FMT_RGB4_BYTE   \

  179.         || (x)==PIX_FMT_BGR8        \

  180.         || (x)==PIX_FMT_RGB8        \

  181.     )

  182. 

  183. #define RGB2YUV_SHIFT 15

  184. #define BY ( (int)(0.114*219/255*(1<<RGB2YUV_SHIFT)+0.5))

  185. #define BV (-(int)(0.081*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  186. #define BU ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  187. #define GY ( (int)(0.587*219/255*(1<<RGB2YUV_SHIFT)+0.5))

  188. #define GV (-(int)(0.419*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  189. #define GU (-(int)(0.331*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  190. #define RY ( (int)(0.299*219/255*(1<<RGB2YUV_SHIFT)+0.5))

  191. #define RV ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  192. #define RU (-(int)(0.169*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  193. 

  194. extern const int32_t ff_yuv2rgb_coeffs[8][4];

  195. 

  196. static const double rgb2yuv_table[8][9]={

  197.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  198.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  199.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  200.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  201.     {0.59  , 0.11  , 0.30  , -0.331, 0.5, -0.169, -0.421, -0.079, 0.5}, //FCC

  202.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  203.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5}, //SMPTE 170M

  204.     {0.701 , 0.087 , 0.212 , -0.384, 0.5  -0.116, -0.445, -0.055, 0.5}, //SMPTE 240M

  205. };

  206. 

  207. /*

  208. NOTES

  209. Special versions: fast Y 1:1 scaling (no interpolation in y direction)

  210. 

  211. TODO

  212. more intelligent misalignment avoidance for the horizontal scaler

  213. write special vertical cubic upscale version

  214. optimize C code (YV12 / minmax)

  215. add support for packed pixel YUV input & output

  216. add support for Y8 output

  217. optimize BGR24 & BGR32

  218. add BGR4 output support

  219. write special BGR->BGR scaler

  220. */

  221. 

  222. #if ARCH_X86 && CONFIG_GPL

  223. DECLARE_ASM_CONST(8, uint64_t, bF8)=       0xF8F8F8F8F8F8F8F8LL;

  224. DECLARE_ASM_CONST(8, uint64_t, bFC)=       0xFCFCFCFCFCFCFCFCLL;

  225. DECLARE_ASM_CONST(8, uint64_t, w10)=       0x0010001000100010LL;

  226. DECLARE_ASM_CONST(8, uint64_t, w02)=       0x0002000200020002LL;

  227. DECLARE_ASM_CONST(8, uint64_t, bm00001111)=0x00000000FFFFFFFFLL;

  228. DECLARE_ASM_CONST(8, uint64_t, bm00000111)=0x0000000000FFFFFFLL;

  229. DECLARE_ASM_CONST(8, uint64_t, bm11111000)=0xFFFFFFFFFF000000LL;

  230. DECLARE_ASM_CONST(8, uint64_t, bm01010101)=0x00FF00FF00FF00FFLL;

  231. 

  232. const DECLARE_ALIGNED(8, uint64_t, ff_dither4[2]) = {

  233.         0x0103010301030103LL,

  234.         0x0200020002000200LL,};

  235. 

  236. const DECLARE_ALIGNED(8, uint64_t, ff_dither8[2]) = {

  237.         0x0602060206020602LL,

  238.         0x0004000400040004LL,};

  239. 

  240. DECLARE_ASM_CONST(8, uint64_t, b16Mask)=   0x001F001F001F001FLL;

  241. DECLARE_ASM_CONST(8, uint64_t, g16Mask)=   0x07E007E007E007E0LL;

  242. DECLARE_ASM_CONST(8, uint64_t, r16Mask)=   0xF800F800F800F800LL;

  243. DECLARE_ASM_CONST(8, uint64_t, b15Mask)=   0x001F001F001F001FLL;

  244. DECLARE_ASM_CONST(8, uint64_t, g15Mask)=   0x03E003E003E003E0LL;

  245. DECLARE_ASM_CONST(8, uint64_t, r15Mask)=   0x7C007C007C007C00LL;

  246. 

  247. DECLARE_ALIGNED(8, const uint64_t, ff_M24A)         = 0x00FF0000FF0000FFLL;

  248. DECLARE_ALIGNED(8, const uint64_t, ff_M24B)         = 0xFF0000FF0000FF00LL;

  249. DECLARE_ALIGNED(8, const uint64_t, ff_M24C)         = 0x0000FF0000FF0000LL;

  250. 

  251. #ifdef FAST_BGR2YV12

  252. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YCoeff)   = 0x000000210041000DULL;

  253. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UCoeff)   = 0x0000FFEEFFDC0038ULL;

  254. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2VCoeff)   = 0x00000038FFD2FFF8ULL;

  255. #else

  256. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YCoeff)   = 0x000020E540830C8BULL;

  257. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UCoeff)   = 0x0000ED0FDAC23831ULL;

  258. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2VCoeff)   = 0x00003831D0E6F6EAULL;

  259. #endif /* FAST_BGR2YV12 */

  260. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YOffset)  = 0x1010101010101010ULL;

  261. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UVOffset) = 0x8080808080808080ULL;

  262. DECLARE_ALIGNED(8, const uint64_t, ff_w1111)        = 0x0001000100010001ULL;

  263. 

  264. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toY1Coeff) = 0x0C88000040870C88ULL;

  265. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toY2Coeff) = 0x20DE4087000020DEULL;

  266. DECLARE_ASM_CONST(8, uint64_t, ff_rgb24toY1Coeff) = 0x20DE0000408720DEULL;

  267. DECLARE_ASM_CONST(8, uint64_t, ff_rgb24toY2Coeff) = 0x0C88408700000C88ULL;

  268. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toYOffset) = 0x0008400000084000ULL;

  269. 

  270. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toUV[2][4]) = {

  271.     {0x38380000DAC83838ULL, 0xECFFDAC80000ECFFULL, 0xF6E40000D0E3F6E4ULL, 0x3838D0E300003838ULL},

  272.     {0xECFF0000DAC8ECFFULL, 0x3838DAC800003838ULL, 0x38380000D0E33838ULL, 0xF6E4D0E30000F6E4ULL},

  273. };

  274. 

  275. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toUVOffset)= 0x0040400000404000ULL;

  276. 

  277. #endif /* ARCH_X86 && CONFIG_GPL */

  278. 

  279. // clipping helper table for C implementations:

  280. static unsigned char clip_table[768];

  281. 

  282. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b);

  283. 

  284. static const uint8_t  __attribute__((aligned(8))) dither_2x2_4[2][8]={

  285. {  1,   3,   1,   3,   1,   3,   1,   3, },

  286. {  2,   0,   2,   0,   2,   0,   2,   0, },

  287. };

  288. 

  289. static const uint8_t  __attribute__((aligned(8))) dither_2x2_8[2][8]={

  290. {  6,   2,   6,   2,   6,   2,   6,   2, },

  291. {  0,   4,   0,   4,   0,   4,   0,   4, },

  292. };

  293. 

  294. const uint8_t  __attribute__((aligned(8))) dither_8x8_32[8][8]={

  295. { 17,   9,  23,  15,  16,   8,  22,  14, },

  296. {  5,  29,   3,  27,   4,  28,   2,  26, },

  297. { 21,  13,  19,  11,  20,  12,  18,  10, },

  298. {  0,  24,   6,  30,   1,  25,   7,  31, },

  299. { 16,   8,  22,  14,  17,   9,  23,  15, },

  300. {  4,  28,   2,  26,   5,  29,   3,  27, },

  301. { 20,  12,  18,  10,  21,  13,  19,  11, },

  302. {  1,  25,   7,  31,   0,  24,   6,  30, },

  303. };

  304. 

  305. #if 0

  306. const uint8_t  __attribute__((aligned(8))) dither_8x8_64[8][8]={

  307. {  0,  48,  12,  60,   3,  51,  15,  63, },

  308. { 32,  16,  44,  28,  35,  19,  47,  31, },

  309. {  8,  56,   4,  52,  11,  59,   7,  55, },

  310. { 40,  24,  36,  20,  43,  27,  39,  23, },

  311. {  2,  50,  14,  62,   1,  49,  13,  61, },

  312. { 34,  18,  46,  30,  33,  17,  45,  29, },

  313. { 10,  58,   6,  54,   9,  57,   5,  53, },

  314. { 42,  26,  38,  22,  41,  25,  37,  21, },

  315. };

  316. #endif

  317. 

  318. const uint8_t  __attribute__((aligned(8))) dither_8x8_73[8][8]={

  319. {  0,  55,  14,  68,   3,  58,  17,  72, },

  320. { 37,  18,  50,  32,  40,  22,  54,  35, },

  321. {  9,  64,   5,  59,  13,  67,   8,  63, },

  322. { 46,  27,  41,  23,  49,  31,  44,  26, },

  323. {  2,  57,  16,  71,   1,  56,  15,  70, },

  324. { 39,  21,  52,  34,  38,  19,  51,  33, },

  325. { 11,  66,   7,  62,  10,  65,   6,  60, },

  326. { 48,  30,  43,  25,  47,  29,  42,  24, },

  327. };

  328. 

  329. #if 0

  330. const uint8_t  __attribute__((aligned(8))) dither_8x8_128[8][8]={

  331. { 68,  36,  92,  60,  66,  34,  90,  58, },

  332. { 20, 116,  12, 108,  18, 114,  10, 106, },

  333. { 84,  52,  76,  44,  82,  50,  74,  42, },

  334. {  0,  96,  24, 120,   6, 102,  30, 126, },

  335. { 64,  32,  88,  56,  70,  38,  94,  62, },

  336. { 16, 112,   8, 104,  22, 118,  14, 110, },

  337. { 80,  48,  72,  40,  86,  54,  78,  46, },

  338. {  4, 100,  28, 124,   2,  98,  26, 122, },

  339. };

  340. #endif

  341. 

  342. #if 1

  343. const uint8_t  __attribute__((aligned(8))) dither_8x8_220[8][8]={

  344. {117,  62, 158, 103, 113,  58, 155, 100, },

  345. { 34, 199,  21, 186,  31, 196,  17, 182, },

  346. {144,  89, 131,  76, 141,  86, 127,  72, },

  347. {  0, 165,  41, 206,  10, 175,  52, 217, },

  348. {110,  55, 151,  96, 120,  65, 162, 107, },

  349. { 28, 193,  14, 179,  38, 203,  24, 189, },

  350. {138,  83, 124,  69, 148,  93, 134,  79, },

  351. {  7, 172,  48, 213,   3, 168,  45, 210, },

  352. };

  353. #elif 1

  354. // tries to correct a gamma of 1.5

  355. const uint8_t  __attribute__((aligned(8))) dither_8x8_220[8][8]={

  356. {  0, 143,  18, 200,   2, 156,  25, 215, },

  357. { 78,  28, 125,  64,  89,  36, 138,  74, },

  358. { 10, 180,   3, 161,  16, 195,   8, 175, },

  359. {109,  51,  93,  38, 121,  60, 105,  47, },

  360. {  1, 152,  23, 210,   0, 147,  20, 205, },

  361. { 85,  33, 134,  71,  81,  30, 130,  67, },

  362. { 14, 190,   6, 171,  12, 185,   5, 166, },

  363. {117,  57, 101,  44, 113,  54,  97,  41, },

  364. };

  365. #elif 1

  366. // tries to correct a gamma of 2.0

  367. const uint8_t  __attribute__((aligned(8))) dither_8x8_220[8][8]={

  368. {  0, 124,   8, 193,   0, 140,  12, 213, },

  369. { 55,  14, 104,  42,  66,  19, 119,  52, },

  370. {  3, 168,   1, 145,   6, 187,   3, 162, },

  371. { 86,  31,  70,  21,  99,  39,  82,  28, },

  372. {  0, 134,  11, 206,   0, 129,   9, 200, },

  373. { 62,  17, 114,  48,  58,  16, 109,  45, },

  374. {  5, 181,   2, 157,   4, 175,   1, 151, },

  375. { 95,  36,  78,  26,  90,  34,  74,  24, },

  376. };

  377. #else

  378. // tries to correct a gamma of 2.5

  379. const uint8_t  __attribute__((aligned(8))) dither_8x8_220[8][8]={

  380. {  0, 107,   3, 187,   0, 125,   6, 212, },

  381. { 39,   7,  86,  28,  49,  11, 102,  36, },

  382. {  1, 158,   0, 131,   3, 180,   1, 151, },

  383. { 68,  19,  52,  12,  81,  25,  64,  17, },

  384. {  0, 119,   5, 203,   0, 113,   4, 195, },

  385. { 45,   9,  96,  33,  42,   8,  91,  30, },

  386. {  2, 172,   1, 144,   2, 165,   0, 137, },

  387. { 77,  23,  60,  15,  72,  21,  56,  14, },

  388. };

  389. #endif

  390. 

  391. const char *sws_format_name(enum PixelFormat format)

  392. {

  393.     switch (format) {

  394.         case PIX_FMT_YUV420P:

  395.             return "yuv420p";

  396.         case PIX_FMT_YUVA420P:

  397.             return "yuva420p";

  398.         case PIX_FMT_YUYV422:

  399.             return "yuyv422";

  400.         case PIX_FMT_RGB24:

  401.             return "rgb24";

  402.         case PIX_FMT_BGR24:

  403.             return "bgr24";

  404.         case PIX_FMT_YUV422P:

  405.             return "yuv422p";

  406.         case PIX_FMT_YUV444P:

  407.             return "yuv444p";

  408.         case PIX_FMT_RGB32:

  409.             return "rgb32";

  410.         case PIX_FMT_YUV410P:

  411.             return "yuv410p";

  412.         case PIX_FMT_YUV411P:

  413.             return "yuv411p";

  414.         case PIX_FMT_RGB565:

  415.             return "rgb565";

  416.         case PIX_FMT_RGB555:

  417.             return "rgb555";

  418.         case PIX_FMT_GRAY16BE:

  419.             return "gray16be";

  420.         case PIX_FMT_GRAY16LE:

  421.             return "gray16le";

  422.         case PIX_FMT_GRAY8:

  423.             return "gray8";

  424.         case PIX_FMT_MONOWHITE:

  425.             return "mono white";

  426.         case PIX_FMT_MONOBLACK:

  427.             return "mono black";

  428.         case PIX_FMT_PAL8:

  429.             return "Palette";

  430.         case PIX_FMT_YUVJ420P:

  431.             return "yuvj420p";

  432.         case PIX_FMT_YUVJ422P:

  433.             return "yuvj422p";

  434.         case PIX_FMT_YUVJ444P:

  435.             return "yuvj444p";

  436.         case PIX_FMT_XVMC_MPEG2_MC:

  437.             return "xvmc_mpeg2_mc";

  438.         case PIX_FMT_XVMC_MPEG2_IDCT:

  439.             return "xvmc_mpeg2_idct";

  440.         case PIX_FMT_UYVY422:

  441.             return "uyvy422";

  442.         case PIX_FMT_UYYVYY411:

  443.             return "uyyvyy411";

  444.         case PIX_FMT_RGB32_1:

  445.             return "rgb32x";

  446.         case PIX_FMT_BGR32_1:

  447.             return "bgr32x";

  448.         case PIX_FMT_BGR32:

  449.             return "bgr32";

  450.         case PIX_FMT_BGR565:

  451.             return "bgr565";

  452.         case PIX_FMT_BGR555:

  453.             return "bgr555";

  454.         case PIX_FMT_BGR8:

  455.             return "bgr8";

  456.         case PIX_FMT_BGR4:

  457.             return "bgr4";

  458.         case PIX_FMT_BGR4_BYTE:

  459.             return "bgr4 byte";

  460.         case PIX_FMT_RGB8:

  461.             return "rgb8";

  462.         case PIX_FMT_RGB4:

  463.             return "rgb4";

  464.         case PIX_FMT_RGB4_BYTE:

  465.             return "rgb4 byte";

  466.         case PIX_FMT_NV12:

  467.             return "nv12";

  468.         case PIX_FMT_NV21:

  469.             return "nv21";

  470.         case PIX_FMT_YUV440P:

  471.             return "yuv440p";

  472.         case PIX_FMT_VDPAU_H264:

  473.             return "vdpau_h264";

  474.         case PIX_FMT_VDPAU_MPEG1:

  475.             return "vdpau_mpeg1";

  476.         case PIX_FMT_VDPAU_MPEG2:

  477.             return "vdpau_mpeg2";

  478.         case PIX_FMT_VDPAU_WMV3:

  479.             return "vdpau_wmv3";

  480.         case PIX_FMT_VDPAU_VC1:

  481.             return "vdpau_vc1";

  482.         case PIX_FMT_YUV420PLE:

  483.             return "yuv420ple";

  484.         case PIX_FMT_YUV422PLE:

  485.             return "yuv422ple";

  486.         case PIX_FMT_YUV444PLE:

  487.             return "yuv444ple";

  488.         case PIX_FMT_YUV420PBE:

  489.             return "yuv420pbe";

  490.         case PIX_FMT_YUV422PBE:

  491.             return "yuv422pbe";

  492.         case PIX_FMT_YUV444PBE:

  493.             return "yuv444pbe";

  494.         default:

  495.             return "Unknown format";

  496.     }

  497. }

  498. 

  499. static inline void yuv2yuvXinC(const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,

  500.                                const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,

  501.                                const int16_t **alpSrc, uint8_t *dest, uint8_t *uDest, uint8_t *vDest, uint8_t *aDest, int dstW, int chrDstW)

  502. {

  503.     //FIXME Optimize (just quickly written not optimized..)

  504.     int i;

  505.     for (i=0; i<dstW; i++)

  506.     {

  507.         int val=1<<18;

  508.         int j;

  509.         for (j=0; j<lumFilterSize; j++)

  510.             val += lumSrc[j][i] * lumFilter[j];

  511. 

  512.         dest[i]= av_clip_uint8(val>>19);

  513.     }

  514. 

  515.     if (uDest)

  516.         for (i=0; i<chrDstW; i++)

  517.         {

  518.             int u=1<<18;

  519.             int v=1<<18;

  520.             int j;

  521.             for (j=0; j<chrFilterSize; j++)

  522.             {

  523.                 u += chrSrc[j][i] * chrFilter[j];

  524.                 v += chrSrc[j][i + VOFW] * chrFilter[j];

  525.             }

  526. 

  527.             uDest[i]= av_clip_uint8(u>>19);

  528.             vDest[i]= av_clip_uint8(v>>19);

  529.         }

  530. 

  531.     if (CONFIG_SWSCALE_ALPHA && aDest)

  532.         for (i=0; i<dstW; i++){

  533.             int val=1<<18;

  534.             int j;

  535.             for (j=0; j<lumFilterSize; j++)

  536.                 val += alpSrc[j][i] * lumFilter[j];

  537. 

  538.             aDest[i]= av_clip_uint8(val>>19);

  539.         }

  540. 

  541. }

  542. 

  543. static inline void yuv2nv12XinC(const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,

  544.                                 const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,

  545.                                 uint8_t *dest, uint8_t *uDest, int dstW, int chrDstW, int dstFormat)

  546. {

  547.     //FIXME Optimize (just quickly written not optimized..)

  548.     int i;

  549.     for (i=0; i<dstW; i++)

  550.     {

  551.         int val=1<<18;

  552.         int j;

  553.         for (j=0; j<lumFilterSize; j++)

  554.             val += lumSrc[j][i] * lumFilter[j];

  555. 

  556.         dest[i]= av_clip_uint8(val>>19);

  557.     }

  558. 

  559.     if (!uDest)

  560.         return;

  561. 

  562.     if (dstFormat == PIX_FMT_NV12)

  563.         for (i=0; i<chrDstW; i++)

  564.         {

  565.             int u=1<<18;

  566.             int v=1<<18;

  567.             int j;

  568.             for (j=0; j<chrFilterSize; j++)

  569.             {

  570.                 u += chrSrc[j][i] * chrFilter[j];

  571.                 v += chrSrc[j][i + VOFW] * chrFilter[j];

  572.             }

  573. 

  574.             uDest[2*i]= av_clip_uint8(u>>19);

  575.             uDest[2*i+1]= av_clip_uint8(v>>19);

  576.         }

  577.     else

  578.         for (i=0; i<chrDstW; i++)

  579.         {

  580.             int u=1<<18;

  581.             int v=1<<18;

  582.             int j;

  583.             for (j=0; j<chrFilterSize; j++)

  584.             {

  585.                 u += chrSrc[j][i] * chrFilter[j];

  586.                 v += chrSrc[j][i + VOFW] * chrFilter[j];

  587.             }

  588. 

  589.             uDest[2*i]= av_clip_uint8(v>>19);

  590.             uDest[2*i+1]= av_clip_uint8(u>>19);

  591.         }

  592. }

  593. 

  594. #define YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha) \

  595.     for (i=0; i<(dstW>>1); i++){\

  596.         int j;\

  597.         int Y1 = 1<<18;\

  598.         int Y2 = 1<<18;\

  599.         int U  = 1<<18;\

  600.         int V  = 1<<18;\

  601.         int av_unused A1, A2;\

  602.         type av_unused *r, *b, *g;\

  603.         const int i2= 2*i;\

  604.         \

  605.         for (j=0; j<lumFilterSize; j++)\

  606.         {\

  607.             Y1 += lumSrc[j][i2] * lumFilter[j];\

  608.             Y2 += lumSrc[j][i2+1] * lumFilter[j];\

  609.         }\

  610.         for (j=0; j<chrFilterSize; j++)\

  611.         {\

  612.             U += chrSrc[j][i] * chrFilter[j];\

  613.             V += chrSrc[j][i+VOFW] * chrFilter[j];\

  614.         }\

  615.         Y1>>=19;\

  616.         Y2>>=19;\

  617.         U >>=19;\

  618.         V >>=19;\

  619.         if (alpha){\

  620.             A1 = 1<<18;\

  621.             A2 = 1<<18;\

  622.             for (j=0; j<lumFilterSize; j++){\

  623.                 A1 += alpSrc[j][i2  ] * lumFilter[j];\

  624.                 A2 += alpSrc[j][i2+1] * lumFilter[j];\

  625.             }\

  626.             A1>>=19;\

  627.             A2>>=19;\

  628.         }\

  629. 

  630. #define YSCALE_YUV_2_PACKEDX_C(type,alpha) \

  631.         YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha)\

  632.         if ((Y1|Y2|U|V)&256)\

  633.         {\

  634.             if (Y1>255)   Y1=255; \

  635.             else if (Y1<0)Y1=0;   \

  636.             if (Y2>255)   Y2=255; \

  637.             else if (Y2<0)Y2=0;   \

  638.             if (U>255)    U=255;  \

  639.             else if (U<0) U=0;    \

  640.             if (V>255)    V=255;  \

  641.             else if (V<0) V=0;    \

  642.         }\

  643.         if (alpha && ((A1|A2)&256)){\

  644.             A1=av_clip_uint8(A1);\

  645.             A2=av_clip_uint8(A2);\

  646.         }

  647. 

  648. #define YSCALE_YUV_2_PACKEDX_FULL_C(rnd,alpha) \

  649.     for (i=0; i<dstW; i++){\

  650.         int j;\

  651.         int Y = 0;\

  652.         int U = -128<<19;\

  653.         int V = -128<<19;\

  654.         int av_unused A;\

  655.         int R,G,B;\

  656.         \

  657.         for (j=0; j<lumFilterSize; j++){\

  658.             Y += lumSrc[j][i     ] * lumFilter[j];\

  659.         }\

  660.         for (j=0; j<chrFilterSize; j++){\

  661.             U += chrSrc[j][i     ] * chrFilter[j];\

  662.             V += chrSrc[j][i+VOFW] * chrFilter[j];\

  663.         }\

  664.         Y >>=10;\

  665.         U >>=10;\

  666.         V >>=10;\

  667.         if (alpha){\

  668.             A = rnd;\

  669.             for (j=0; j<lumFilterSize; j++)\

  670.                 A += alpSrc[j][i     ] * lumFilter[j];\

  671.             A >>=19;\

  672.             if (A&256)\

  673.                 A = av_clip_uint8(A);\

  674.         }\

  675. 

  676. #define YSCALE_YUV_2_RGBX_FULL_C(rnd,alpha) \

  677.     YSCALE_YUV_2_PACKEDX_FULL_C(rnd>>3,alpha)\

  678.         Y-= c->yuv2rgb_y_offset;\

  679.         Y*= c->yuv2rgb_y_coeff;\

  680.         Y+= rnd;\

  681.         R= Y + V*c->yuv2rgb_v2r_coeff;\

  682.         G= Y + V*c->yuv2rgb_v2g_coeff + U*c->yuv2rgb_u2g_coeff;\

  683.         B= Y +                          U*c->yuv2rgb_u2b_coeff;\

  684.         if ((R|G|B)&(0xC0000000)){\

  685.             if (R>=(256<<22))   R=(256<<22)-1; \

  686.             else if (R<0)R=0;   \

  687.             if (G>=(256<<22))   G=(256<<22)-1; \

  688.             else if (G<0)G=0;   \

  689.             if (B>=(256<<22))   B=(256<<22)-1; \

  690.             else if (B<0)B=0;   \

  691.         }\

  692. 

  693. 

  694. #define YSCALE_YUV_2_GRAY16_C \

  695.     for (i=0; i<(dstW>>1); i++){\

  696.         int j;\

  697.         int Y1 = 1<<18;\

  698.         int Y2 = 1<<18;\

  699.         int U  = 1<<18;\

  700.         int V  = 1<<18;\

  701.         \

  702.         const int i2= 2*i;\

  703.         \

  704.         for (j=0; j<lumFilterSize; j++)\

  705.         {\

  706.             Y1 += lumSrc[j][i2] * lumFilter[j];\

  707.             Y2 += lumSrc[j][i2+1] * lumFilter[j];\

  708.         }\

  709.         Y1>>=11;\

  710.         Y2>>=11;\

  711.         if ((Y1|Y2|U|V)&65536)\

  712.         {\

  713.             if (Y1>65535)   Y1=65535; \

  714.             else if (Y1<0)Y1=0;   \

  715.             if (Y2>65535)   Y2=65535; \

  716.             else if (Y2<0)Y2=0;   \

  717.         }

  718. 

  719. #define YSCALE_YUV_2_RGBX_C(type,alpha) \

  720.     YSCALE_YUV_2_PACKEDX_C(type,alpha)  /* FIXME fix tables so that clipping is not needed and then use _NOCLIP*/\

  721.     r = (type *)c->table_rV[V];   \

  722.     g = (type *)(c->table_gU[U] + c->table_gV[V]); \

  723.     b = (type *)c->table_bU[U];   \

  724. 

  725. #define YSCALE_YUV_2_PACKED2_C(type,alpha)   \

  726.     for (i=0; i<(dstW>>1); i++){ \

  727.         const int i2= 2*i;       \

  728.         int Y1= (buf0[i2  ]*yalpha1+buf1[i2  ]*yalpha)>>19;           \

  729.         int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>19;           \

  730.         int U= (uvbuf0[i     ]*uvalpha1+uvbuf1[i     ]*uvalpha)>>19;  \

  731.         int V= (uvbuf0[i+VOFW]*uvalpha1+uvbuf1[i+VOFW]*uvalpha)>>19;  \

  732.         type av_unused *r, *b, *g;                                    \

  733.         int av_unused A1, A2;                                         \

  734.         if (alpha){\

  735.             A1= (abuf0[i2  ]*yalpha1+abuf1[i2  ]*yalpha)>>19;         \

  736.             A2= (abuf0[i2+1]*yalpha1+abuf1[i2+1]*yalpha)>>19;         \

  737.         }\

  738. 

  739. #define YSCALE_YUV_2_GRAY16_2_C   \

  740.     for (i=0; i<(dstW>>1); i++){ \

  741.         const int i2= 2*i;       \

  742.         int Y1= (buf0[i2  ]*yalpha1+buf1[i2  ]*yalpha)>>11;           \

  743.         int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>11;           \

  744. 

  745. #define YSCALE_YUV_2_RGB2_C(type,alpha) \

  746.     YSCALE_YUV_2_PACKED2_C(type,alpha)\

  747.     r = (type *)c->table_rV[V];\

  748.     g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  749.     b = (type *)c->table_bU[U];\

  750. 

  751. #define YSCALE_YUV_2_PACKED1_C(type,alpha) \

  752.     for (i=0; i<(dstW>>1); i++){\

  753.         const int i2= 2*i;\

  754.         int Y1= buf0[i2  ]>>7;\

  755.         int Y2= buf0[i2+1]>>7;\

  756.         int U= (uvbuf1[i     ])>>7;\

  757.         int V= (uvbuf1[i+VOFW])>>7;\

  758.         type av_unused *r, *b, *g;\

  759.         int av_unused A1, A2;\

  760.         if (alpha){\

  761.             A1= abuf0[i2  ]>>7;\

  762.             A2= abuf0[i2+1]>>7;\

  763.         }\

  764. 

  765. #define YSCALE_YUV_2_GRAY16_1_C \

  766.     for (i=0; i<(dstW>>1); i++){\

  767.         const int i2= 2*i;\

  768.         int Y1= buf0[i2  ]<<1;\

  769.         int Y2= buf0[i2+1]<<1;\

  770. 

  771. #define YSCALE_YUV_2_RGB1_C(type,alpha) \

  772.     YSCALE_YUV_2_PACKED1_C(type,alpha)\

  773.     r = (type *)c->table_rV[V];\

  774.     g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  775.     b = (type *)c->table_bU[U];\

  776. 

  777. #define YSCALE_YUV_2_PACKED1B_C(type,alpha) \

  778.     for (i=0; i<(dstW>>1); i++){\

  779.         const int i2= 2*i;\

  780.         int Y1= buf0[i2  ]>>7;\

  781.         int Y2= buf0[i2+1]>>7;\

  782.         int U= (uvbuf0[i     ] + uvbuf1[i     ])>>8;\

  783.         int V= (uvbuf0[i+VOFW] + uvbuf1[i+VOFW])>>8;\

  784.         type av_unused *r, *b, *g;\

  785.         int av_unused A1, A2;\

  786.         if (alpha){\

  787.             A1= abuf0[i2  ]>>7;\

  788.             A2= abuf0[i2+1]>>7;\

  789.         }\

  790. 

  791. #define YSCALE_YUV_2_RGB1B_C(type,alpha) \

  792.     YSCALE_YUV_2_PACKED1B_C(type,alpha)\

  793.     r = (type *)c->table_rV[V];\

  794.     g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  795.     b = (type *)c->table_bU[U];\

  796. 

  797. #define YSCALE_YUV_2_MONO2_C \

  798.     const uint8_t * const d128=dither_8x8_220[y&7];\

  799.     uint8_t *g= c->table_gU[128] + c->table_gV[128];\

  800.     for (i=0; i<dstW-7; i+=8){\

  801.         int acc;\

  802.         acc =       g[((buf0[i  ]*yalpha1+buf1[i  ]*yalpha)>>19) + d128[0]];\

  803.         acc+= acc + g[((buf0[i+1]*yalpha1+buf1[i+1]*yalpha)>>19) + d128[1]];\

  804.         acc+= acc + g[((buf0[i+2]*yalpha1+buf1[i+2]*yalpha)>>19) + d128[2]];\

  805.         acc+= acc + g[((buf0[i+3]*yalpha1+buf1[i+3]*yalpha)>>19) + d128[3]];\

  806.         acc+= acc + g[((buf0[i+4]*yalpha1+buf1[i+4]*yalpha)>>19) + d128[4]];\

  807.         acc+= acc + g[((buf0[i+5]*yalpha1+buf1[i+5]*yalpha)>>19) + d128[5]];\

  808.         acc+= acc + g[((buf0[i+6]*yalpha1+buf1[i+6]*yalpha)>>19) + d128[6]];\

  809.         acc+= acc + g[((buf0[i+7]*yalpha1+buf1[i+7]*yalpha)>>19) + d128[7]];\

  810.         ((uint8_t*)dest)[0]= c->dstFormat == PIX_FMT_MONOBLACK ? acc : ~acc;\

  811.         dest++;\

  812.     }\

  813. 

  814. 

  815. #define YSCALE_YUV_2_MONOX_C \

  816.     const uint8_t * const d128=dither_8x8_220[y&7];\

  817.     uint8_t *g= c->table_gU[128] + c->table_gV[128];\

  818.     int acc=0;\

  819.     for (i=0; i<dstW-1; i+=2){\

  820.         int j;\

  821.         int Y1=1<<18;\

  822.         int Y2=1<<18;\

  823. \

  824.         for (j=0; j<lumFilterSize; j++)\

  825.         {\

  826.             Y1 += lumSrc[j][i] * lumFilter[j];\

  827.             Y2 += lumSrc[j][i+1] * lumFilter[j];\

  828.         }\

  829.         Y1>>=19;\

  830.         Y2>>=19;\

  831.         if ((Y1|Y2)&256)\

  832.         {\

  833.             if (Y1>255)   Y1=255;\

  834.             else if (Y1<0)Y1=0;\

  835.             if (Y2>255)   Y2=255;\

  836.             else if (Y2<0)Y2=0;\

  837.         }\

  838.         acc+= acc + g[Y1+d128[(i+0)&7]];\

  839.         acc+= acc + g[Y2+d128[(i+1)&7]];\

  840.         if ((i&7)==6){\

  841.             ((uint8_t*)dest)[0]= c->dstFormat == PIX_FMT_MONOBLACK ? acc : ~acc;\

  842.             dest++;\

  843.         }\

  844.     }

  845. 

  846. 

  847. #define YSCALE_YUV_2_ANYRGB_C(func, func2, func_g16, func_monoblack)\

  848.     switch(c->dstFormat)\

  849.     {\

  850.     case PIX_FMT_RGBA:\

  851.     case PIX_FMT_BGRA:\

  852.         if (CONFIG_SMALL){\

  853.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;\

  854.             func(uint32_t,needAlpha)\

  855.                 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + (needAlpha ? (A1<<24) : 0);\

  856.                 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + (needAlpha ? (A2<<24) : 0);\

  857.             }\

  858.         }else{\

  859.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){\

  860.                 func(uint32_t,1)\

  861.                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + (A1<<24);\

  862.                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + (A2<<24);\

  863.                 }\

  864.             }else{\

  865.                 func(uint32_t,0)\

  866.                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];\

  867.                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];\

  868.                 }\

  869.             }\

  870.         }\

  871.         break;\

  872.     case PIX_FMT_ARGB:\

  873.     case PIX_FMT_ABGR:\

  874.         if (CONFIG_SMALL){\

  875.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;\

  876.             func(uint32_t,needAlpha)\

  877.                 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + (needAlpha ? A1 : 0);\

  878.                 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + (needAlpha ? A2 : 0);\

  879.             }\

  880.         }else{\

  881.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){\

  882.                 func(uint32_t,1)\

  883.                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + A1;\

  884.                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + A2;\

  885.                 }\

  886.             }else{\

  887.                 func(uint32_t,0)\

  888.                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];\

  889.                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];\

  890.                 }\

  891.             }\

  892.         }                \

  893.         break;\

  894.     case PIX_FMT_RGB24:\

  895.         func(uint8_t,0)\

  896.             ((uint8_t*)dest)[0]= r[Y1];\

  897.             ((uint8_t*)dest)[1]= g[Y1];\

  898.             ((uint8_t*)dest)[2]= b[Y1];\

  899.             ((uint8_t*)dest)[3]= r[Y2];\

  900.             ((uint8_t*)dest)[4]= g[Y2];\

  901.             ((uint8_t*)dest)[5]= b[Y2];\

  902.             dest+=6;\

  903.         }\

  904.         break;\

  905.     case PIX_FMT_BGR24:\

  906.         func(uint8_t,0)\

  907.             ((uint8_t*)dest)[0]= b[Y1];\

  908.             ((uint8_t*)dest)[1]= g[Y1];\

  909.             ((uint8_t*)dest)[2]= r[Y1];\

  910.             ((uint8_t*)dest)[3]= b[Y2];\

  911.             ((uint8_t*)dest)[4]= g[Y2];\

  912.             ((uint8_t*)dest)[5]= r[Y2];\

  913.             dest+=6;\

  914.         }\

  915.         break;\

  916.     case PIX_FMT_RGB565:\

  917.     case PIX_FMT_BGR565:\

  918.         {\

  919.             const int dr1= dither_2x2_8[y&1    ][0];\

  920.             const int dg1= dither_2x2_4[y&1    ][0];\

  921.             const int db1= dither_2x2_8[(y&1)^1][0];\

  922.             const int dr2= dither_2x2_8[y&1    ][1];\

  923.             const int dg2= dither_2x2_4[y&1    ][1];\

  924.             const int db2= dither_2x2_8[(y&1)^1][1];\

  925.             func(uint16_t,0)\

  926.                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\

  927.                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\

  928.             }\

  929.         }\

  930.         break;\

  931.     case PIX_FMT_RGB555:\

  932.     case PIX_FMT_BGR555:\

  933.         {\

  934.             const int dr1= dither_2x2_8[y&1    ][0];\

  935.             const int dg1= dither_2x2_8[y&1    ][1];\

  936.             const int db1= dither_2x2_8[(y&1)^1][0];\

  937.             const int dr2= dither_2x2_8[y&1    ][1];\

  938.             const int dg2= dither_2x2_8[y&1    ][0];\

  939.             const int db2= dither_2x2_8[(y&1)^1][1];\

  940.             func(uint16_t,0)\

  941.                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\

  942.                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\

  943.             }\

  944.         }\

  945.         break;\

  946.     case PIX_FMT_RGB8:\

  947.     case PIX_FMT_BGR8:\

  948.         {\

  949.             const uint8_t * const d64= dither_8x8_73[y&7];\

  950.             const uint8_t * const d32= dither_8x8_32[y&7];\

  951.             func(uint8_t,0)\

  952.                 ((uint8_t*)dest)[i2+0]= r[Y1+d32[(i2+0)&7]] + g[Y1+d32[(i2+0)&7]] + b[Y1+d64[(i2+0)&7]];\

  953.                 ((uint8_t*)dest)[i2+1]= r[Y2+d32[(i2+1)&7]] + g[Y2+d32[(i2+1)&7]] + b[Y2+d64[(i2+1)&7]];\

  954.             }\

  955.         }\

  956.         break;\

  957.     case PIX_FMT_RGB4:\

  958.     case PIX_FMT_BGR4:\

  959.         {\

  960.             const uint8_t * const d64= dither_8x8_73 [y&7];\

  961.             const uint8_t * const d128=dither_8x8_220[y&7];\

  962.             func(uint8_t,0)\

  963.                 ((uint8_t*)dest)[i]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]]\

  964.                                  + ((r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]])<<4);\

  965.             }\

  966.         }\

  967.         break;\

  968.     case PIX_FMT_RGB4_BYTE:\

  969.     case PIX_FMT_BGR4_BYTE:\

  970.         {\

  971.             const uint8_t * const d64= dither_8x8_73 [y&7];\

  972.             const uint8_t * const d128=dither_8x8_220[y&7];\

  973.             func(uint8_t,0)\

  974.                 ((uint8_t*)dest)[i2+0]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]];\

  975.                 ((uint8_t*)dest)[i2+1]= r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]];\

  976.             }\

  977.         }\

  978.         break;\

  979.     case PIX_FMT_MONOBLACK:\

  980.     case PIX_FMT_MONOWHITE:\

  981.         {\

  982.             func_monoblack\

  983.         }\

  984.         break;\

  985.     case PIX_FMT_YUYV422:\

  986.         func2\

  987.             ((uint8_t*)dest)[2*i2+0]= Y1;\

  988.             ((uint8_t*)dest)[2*i2+1]= U;\

  989.             ((uint8_t*)dest)[2*i2+2]= Y2;\

  990.             ((uint8_t*)dest)[2*i2+3]= V;\

  991.         }                \

  992.         break;\

  993.     case PIX_FMT_UYVY422:\

  994.         func2\

  995.             ((uint8_t*)dest)[2*i2+0]= U;\

  996.             ((uint8_t*)dest)[2*i2+1]= Y1;\

  997.             ((uint8_t*)dest)[2*i2+2]= V;\

  998.             ((uint8_t*)dest)[2*i2+3]= Y2;\

  999.         }                \

  1000.         break;\

  1001.     case PIX_FMT_GRAY16BE:\

  1002.         func_g16\

  1003.             ((uint8_t*)dest)[2*i2+0]= Y1>>8;\

  1004.             ((uint8_t*)dest)[2*i2+1]= Y1;\

  1005.             ((uint8_t*)dest)[2*i2+2]= Y2>>8;\

  1006.             ((uint8_t*)dest)[2*i2+3]= Y2;\

  1007.         }                \

  1008.         break;\

  1009.     case PIX_FMT_GRAY16LE:\

  1010.         func_g16\

  1011.             ((uint8_t*)dest)[2*i2+0]= Y1;\

  1012.             ((uint8_t*)dest)[2*i2+1]= Y1>>8;\

  1013.             ((uint8_t*)dest)[2*i2+2]= Y2;\

  1014.             ((uint8_t*)dest)[2*i2+3]= Y2>>8;\

  1015.         }                \

  1016.         break;\

  1017.     }\

  1018. 

  1019. 

  1020. static inline void yuv2packedXinC(SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,

  1021.                                   const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,

  1022.                                   const int16_t **alpSrc, uint8_t *dest, int dstW, int y)

  1023. {

  1024.     int i;

  1025.     YSCALE_YUV_2_ANYRGB_C(YSCALE_YUV_2_RGBX_C, YSCALE_YUV_2_PACKEDX_C(void,0), YSCALE_YUV_2_GRAY16_C, YSCALE_YUV_2_MONOX_C)

  1026. }

  1027. 

  1028. static inline void yuv2rgbXinC_full(SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,

  1029.                                     const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,

  1030.                                     const int16_t **alpSrc, uint8_t *dest, int dstW, int y)

  1031. {

  1032.     int i;

  1033.     int step= fmt_depth(c->dstFormat)/8;

  1034.     int aidx= 3;

  1035. 

  1036.     switch(c->dstFormat){

  1037.     case PIX_FMT_ARGB:

  1038.         dest++;

  1039.         aidx= 0;

  1040.     case PIX_FMT_RGB24:

  1041.         aidx--;

  1042.     case PIX_FMT_RGBA:

  1043.         if (CONFIG_SMALL){

  1044.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;

  1045.             YSCALE_YUV_2_RGBX_FULL_C(1<<21, needAlpha)

  1046.                 dest[aidx]= needAlpha ? A : 255;

  1047.                 dest[0]= R>>22;

  1048.                 dest[1]= G>>22;

  1049.                 dest[2]= B>>22;

  1050.                 dest+= step;

  1051.             }

  1052.         }else{

  1053.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){

  1054.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 1)

  1055.                     dest[aidx]= A;

  1056.                     dest[0]= R>>22;

  1057.                     dest[1]= G>>22;

  1058.                     dest[2]= B>>22;

  1059.                     dest+= step;

  1060.                 }

  1061.             }else{

  1062.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)

  1063.                     dest[aidx]= 255;

  1064.                     dest[0]= R>>22;

  1065.                     dest[1]= G>>22;

  1066.                     dest[2]= B>>22;

  1067.                     dest+= step;

  1068.                 }

  1069.             }

  1070.         }

  1071.         break;

  1072.     case PIX_FMT_ABGR:

  1073.         dest++;

  1074.         aidx= 0;

  1075.     case PIX_FMT_BGR24:

  1076.         aidx--;

  1077.     case PIX_FMT_BGRA:

  1078.         if (CONFIG_SMALL){

  1079.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;

  1080.             YSCALE_YUV_2_RGBX_FULL_C(1<<21, needAlpha)

  1081.                 dest[aidx]= needAlpha ? A : 255;

  1082.                 dest[0]= B>>22;

  1083.                 dest[1]= G>>22;

  1084.                 dest[2]= R>>22;

  1085.                 dest+= step;

  1086.             }

  1087.         }else{

  1088.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){

  1089.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 1)

  1090.                     dest[aidx]= A;

  1091.                     dest[0]= B>>22;

  1092.                     dest[1]= G>>22;

  1093.                     dest[2]= R>>22;

  1094.                     dest+= step;

  1095.                 }

  1096.             }else{

  1097.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)

  1098.                     dest[aidx]= 255;

  1099.                     dest[0]= B>>22;

  1100.                     dest[1]= G>>22;

  1101.                     dest[2]= R>>22;

  1102.                     dest+= step;

  1103.                 }

  1104.             }

  1105.         }

  1106.         break;

  1107.     default:

  1108.         assert(0);

  1109.     }

  1110. }

  1111. 

  1112. static void fillPlane(uint8_t* plane, int stride, int width, int height, int y, uint8_t val){

  1113.     int i;

  1114.     uint8_t *ptr = plane + stride*y;

  1115.     for (i=0; i<height; i++){

  1116.         memset(ptr, val, width);

  1117.         ptr += stride;

  1118.     }

  1119. }

  1120. 

  1121. //Note: we have C, MMX, MMX2, 3DNOW versions, there is no 3DNOW+MMX2 one

  1122. //Plain C versions

  1123. #if !HAVE_MMX || CONFIG_RUNTIME_CPUDETECT || !CONFIG_GPL

  1124. #define COMPILE_C

  1125. #endif

  1126. 

  1127. #if ARCH_PPC

  1128. #if (HAVE_ALTIVEC || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1129. #undef COMPILE_C

  1130. #define COMPILE_ALTIVEC

  1131. #endif

  1132. #endif //ARCH_PPC

  1133. 

  1134. #if ARCH_X86

  1135. 

  1136. #if ((HAVE_MMX && !HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1137. #define COMPILE_MMX

  1138. #endif

  1139. 

  1140. #if (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1141. #define COMPILE_MMX2

  1142. #endif

  1143. 

  1144. #if ((HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1145. #define COMPILE_3DNOW

  1146. #endif

  1147. #endif //ARCH_X86

  1148. 

  1149. #undef HAVE_MMX

  1150. #undef HAVE_MMX2

  1151. #undef HAVE_AMD3DNOW

  1152. #undef HAVE_ALTIVEC

  1153. #define HAVE_MMX 0

  1154. #define HAVE_MMX2 0

  1155. #define HAVE_AMD3DNOW 0

  1156. #define HAVE_ALTIVEC 0

  1157. 

  1158. #ifdef COMPILE_C

  1159. #define RENAME(a) a ## _C

  1160. #include "swscale_template.c"

  1161. #endif

  1162. 

  1163. #ifdef COMPILE_ALTIVEC

  1164. #undef RENAME

  1165. #undef HAVE_ALTIVEC

  1166. #define HAVE_ALTIVEC 1

  1167. #define RENAME(a) a ## _altivec

  1168. #include "swscale_template.c"

  1169. #endif

  1170. 

  1171. #if ARCH_X86

  1172. 

  1173. //MMX versions

  1174. #ifdef COMPILE_MMX

  1175. #undef RENAME

  1176. #undef HAVE_MMX

  1177. #undef HAVE_MMX2

  1178. #undef HAVE_AMD3DNOW

  1179. #define HAVE_MMX 1

  1180. #define HAVE_MMX2 0

  1181. #define HAVE_AMD3DNOW 0

  1182. #define RENAME(a) a ## _MMX

  1183. #include "swscale_template.c"

  1184. #endif

  1185. 

  1186. //MMX2 versions

  1187. #ifdef COMPILE_MMX2

  1188. #undef RENAME

  1189. #undef HAVE_MMX

  1190. #undef HAVE_MMX2

  1191. #undef HAVE_AMD3DNOW

  1192. #define HAVE_MMX 1

  1193. #define HAVE_MMX2 1

  1194. #define HAVE_AMD3DNOW 0

  1195. #define RENAME(a) a ## _MMX2

  1196. #include "swscale_template.c"

  1197. #endif

  1198. 

  1199. //3DNOW versions

  1200. #ifdef COMPILE_3DNOW

  1201. #undef RENAME

  1202. #undef HAVE_MMX

  1203. #undef HAVE_MMX2

  1204. #undef HAVE_AMD3DNOW

  1205. #define HAVE_MMX 1

  1206. #define HAVE_MMX2 0

  1207. #define HAVE_AMD3DNOW 1

  1208. #define RENAME(a) a ## _3DNow

  1209. #include "swscale_template.c"

  1210. #endif

  1211. 

  1212. #endif //ARCH_X86

  1213. 

  1214. // minor note: the HAVE_xyz are messed up after this line so don't use them

  1215. 

  1216. static double getSplineCoeff(double a, double b, double c, double d, double dist)

  1217. {

  1218. //    printf("%f %f %f %f %f\n", a,b,c,d,dist);

  1219.     if (dist<=1.0)      return ((d*dist + c)*dist + b)*dist +a;

  1220.     else                return getSplineCoeff(        0.0,

  1221.                                              b+ 2.0*c + 3.0*d,

  1222.                                                     c + 3.0*d,

  1223.                                             -b- 3.0*c - 6.0*d,

  1224.                                             dist-1.0);

  1225. }

  1226. 

  1227. static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,

  1228.                              int srcW, int dstW, int filterAlign, int one, int flags,

  1229.                              SwsVector *srcFilter, SwsVector *dstFilter, double param[2])

  1230. {

  1231.     int i;

  1232.     int filterSize;

  1233.     int filter2Size;

  1234.     int minFilterSize;

  1235.     int64_t *filter=NULL;

  1236.     int64_t *filter2=NULL;

  1237.     const int64_t fone= 1LL<<54;

  1238.     int ret= -1;

  1239. #if ARCH_X86

  1240.     if (flags & SWS_CPU_CAPS_MMX)

  1241.         __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)

  1242. #endif

  1243. 

  1244.     // NOTE: the +1 is for the MMX scaler which reads over the end

  1245.     *filterPos = av_malloc((dstW+1)*sizeof(int16_t));

  1246. 

  1247.     if (FFABS(xInc - 0x10000) <10) // unscaled

  1248.     {

  1249.         int i;

  1250.         filterSize= 1;

  1251.         filter= av_mallocz(dstW*sizeof(*filter)*filterSize);

  1252. 

  1253.         for (i=0; i<dstW; i++)

  1254.         {

  1255.             filter[i*filterSize]= fone;

  1256.             (*filterPos)[i]=i;

  1257.         }

  1258. 

  1259.     }

  1260.     else if (flags&SWS_POINT) // lame looking point sampling mode

  1261.     {

  1262.         int i;

  1263.         int xDstInSrc;

  1264.         filterSize= 1;

  1265.         filter= av_malloc(dstW*sizeof(*filter)*filterSize);

  1266. 

  1267.         xDstInSrc= xInc/2 - 0x8000;

  1268.         for (i=0; i<dstW; i++)

  1269.         {

  1270.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1271. 

  1272.             (*filterPos)[i]= xx;

  1273.             filter[i]= fone;

  1274.             xDstInSrc+= xInc;

  1275.         }

  1276.     }

  1277.     else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale

  1278.     {

  1279.         int i;

  1280.         int xDstInSrc;

  1281.         if      (flags&SWS_BICUBIC) filterSize= 4;

  1282.         else if (flags&SWS_X      ) filterSize= 4;

  1283.         else                        filterSize= 2; // SWS_BILINEAR / SWS_AREA

  1284.         filter= av_malloc(dstW*sizeof(*filter)*filterSize);

  1285. 

  1286.         xDstInSrc= xInc/2 - 0x8000;

  1287.         for (i=0; i<dstW; i++)

  1288.         {

  1289.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1290.             int j;

  1291. 

  1292.             (*filterPos)[i]= xx;

  1293.                 //bilinear upscale / linear interpolate / area averaging

  1294.                 for (j=0; j<filterSize; j++)

  1295.                 {

  1296.                     int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);

  1297.                     if (coeff<0) coeff=0;

  1298.                     filter[i*filterSize + j]= coeff;

  1299.                     xx++;

  1300.                 }

  1301.             xDstInSrc+= xInc;

  1302.         }

  1303.     }

  1304.     else

  1305.     {

  1306.         int xDstInSrc;

  1307.         int sizeFactor;

  1308. 

  1309.         if      (flags&SWS_BICUBIC)      sizeFactor=  4;

  1310.         else if (flags&SWS_X)            sizeFactor=  8;

  1311.         else if (flags&SWS_AREA)         sizeFactor=  1; //downscale only, for upscale it is bilinear

  1312.         else if (flags&SWS_GAUSS)        sizeFactor=  8;   // infinite ;)

  1313.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;

  1314.         else if (flags&SWS_SINC)         sizeFactor= 20; // infinite ;)

  1315.         else if (flags&SWS_SPLINE)       sizeFactor= 20;  // infinite ;)

  1316.         else if (flags&SWS_BILINEAR)     sizeFactor=  2;

  1317.         else {

  1318.             sizeFactor= 0; //GCC warning killer

  1319.             assert(0);

  1320.         }

  1321. 

  1322.         if (xInc <= 1<<16)      filterSize= 1 + sizeFactor; // upscale

  1323.         else                    filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;

  1324. 

  1325.         if (filterSize > srcW-2) filterSize=srcW-2;

  1326. 

  1327.         filter= av_malloc(dstW*sizeof(*filter)*filterSize);

  1328. 

  1329.         xDstInSrc= xInc - 0x10000;

  1330.         for (i=0; i<dstW; i++)

  1331.         {

  1332.             int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);

  1333.             int j;

  1334.             (*filterPos)[i]= xx;

  1335.             for (j=0; j<filterSize; j++)

  1336.             {

  1337.                 int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;

  1338.                 double floatd;

  1339.                 int64_t coeff;

  1340. 

  1341.                 if (xInc > 1<<16)

  1342.                     d= d*dstW/srcW;

  1343.                 floatd= d * (1.0/(1<<30));

  1344. 

  1345.                 if (flags & SWS_BICUBIC)

  1346.                 {

  1347.                     int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] :   0) * (1<<24);

  1348.                     int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);

  1349.                     int64_t dd = ( d*d)>>30;

  1350.                     int64_t ddd= (dd*d)>>30;

  1351. 

  1352.                     if      (d < 1LL<<30)

  1353.                         coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);

  1354.                     else if (d < 1LL<<31)

  1355.                         coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);

  1356.                     else

  1357.                         coeff=0.0;

  1358.                     coeff *= fone>>(30+24);

  1359.                 }

  1360. /*                else if (flags & SWS_X)

  1361.                 {

  1362.                     double p= param ? param*0.01 : 0.3;

  1363.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1364.                     coeff*= pow(2.0, - p*d*d);

  1365.                 }*/

  1366.                 else if (flags & SWS_X)

  1367.                 {

  1368.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1369.                     double c;

  1370. 

  1371.                     if (floatd<1.0)

  1372.                         c = cos(floatd*PI);

  1373.                     else

  1374.                         c=-1.0;

  1375.                     if (c<0.0)      c= -pow(-c, A);

  1376.                     else            c=  pow( c, A);

  1377.                     coeff= (c*0.5 + 0.5)*fone;

  1378.                 }

  1379.                 else if (flags & SWS_AREA)

  1380.                 {

  1381.                     int64_t d2= d - (1<<29);

  1382.                     if      (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));

  1383.                     else if (d2*xInc <  (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));

  1384.                     else coeff=0.0;

  1385.                     coeff *= fone>>(30+16);

  1386.                 }

  1387.                 else if (flags & SWS_GAUSS)

  1388.                 {

  1389.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1390.                     coeff = (pow(2.0, - p*floatd*floatd))*fone;

  1391.                 }

  1392.                 else if (flags & SWS_SINC)

  1393.                 {

  1394.                     coeff = (d ? sin(floatd*PI)/(floatd*PI) : 1.0)*fone;

  1395.                 }

  1396.                 else if (flags & SWS_LANCZOS)

  1397.                 {

  1398.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1399.                     coeff = (d ? sin(floatd*PI)*sin(floatd*PI/p)/(floatd*floatd*PI*PI/p) : 1.0)*fone;

  1400.                     if (floatd>p) coeff=0;

  1401.                 }

  1402.                 else if (flags & SWS_BILINEAR)

  1403.                 {

  1404.                     coeff= (1<<30) - d;

  1405.                     if (coeff<0) coeff=0;

  1406.                     coeff *= fone >> 30;

  1407.                 }

  1408.                 else if (flags & SWS_SPLINE)

  1409.                 {

  1410.                     double p=-2.196152422706632;

  1411.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;

  1412.                 }

  1413.                 else {

  1414.                     coeff= 0.0; //GCC warning killer

  1415.                     assert(0);

  1416.                 }

  1417. 

  1418.                 filter[i*filterSize + j]= coeff;

  1419.                 xx++;

  1420.             }

  1421.             xDstInSrc+= 2*xInc;

  1422.         }

  1423.     }

  1424. 

  1425.     /* apply src & dst Filter to filter -> filter2

  1426.        av_free(filter);

  1427.     */

  1428.     assert(filterSize>0);

  1429.     filter2Size= filterSize;

  1430.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1431.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1432.     assert(filter2Size>0);

  1433.     filter2= av_mallocz(filter2Size*dstW*sizeof(*filter2));

  1434. 

  1435.     for (i=0; i<dstW; i++)

  1436.     {

  1437.         int j, k;

  1438. 

  1439.         if(srcFilter){

  1440.             for (k=0; k<srcFilter->length; k++){

  1441.                 for (j=0; j<filterSize; j++)

  1442.                     filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];

  1443.             }

  1444.         }else{

  1445.             for (j=0; j<filterSize; j++)

  1446.                 filter2[i*filter2Size + j]= filter[i*filterSize + j];

  1447.         }

  1448.         //FIXME dstFilter

  1449. 

  1450.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1451.     }

  1452.     av_freep(&filter);

  1453. 

  1454.     /* try to reduce the filter-size (step1 find size and shift left) */

  1455.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1456.     minFilterSize= 0;

  1457.     for (i=dstW-1; i>=0; i--)

  1458.     {

  1459.         int min= filter2Size;

  1460.         int j;

  1461.         int64_t cutOff=0.0;

  1462. 

  1463.         /* get rid off near zero elements on the left by shifting left */

  1464.         for (j=0; j<filter2Size; j++)

  1465.         {

  1466.             int k;

  1467.             cutOff += FFABS(filter2[i*filter2Size]);

  1468. 

  1469.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  1470. 

  1471.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1472.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1473. 

  1474.             // move filter coefficients left

  1475.             for (k=1; k<filter2Size; k++)

  1476.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1477.             filter2[i*filter2Size + k - 1]= 0;

  1478.             (*filterPos)[i]++;

  1479.         }

  1480. 

  1481.         cutOff=0;

  1482.         /* count near zeros on the right */

  1483.         for (j=filter2Size-1; j>0; j--)

  1484.         {

  1485.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1486. 

  1487.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  1488.             min--;

  1489.         }

  1490. 

  1491.         if (min>minFilterSize) minFilterSize= min;

  1492.     }

  1493. 

  1494.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1495.         // we can handle the special case 4,

  1496.         // so we don't want to go to the full 8

  1497.         if (minFilterSize < 5)

  1498.             filterAlign = 4;

  1499. 

  1500.         // We really don't want to waste our time

  1501.         // doing useless computation, so fall back on

  1502.         // the scalar C code for very small filters.

  1503.         // Vectorizing is worth it only if you have a

  1504.         // decent-sized vector.

  1505.         if (minFilterSize < 3)

  1506.             filterAlign = 1;

  1507.     }

  1508. 

  1509.     if (flags & SWS_CPU_CAPS_MMX) {

  1510.         // special case for unscaled vertical filtering

  1511.         if (minFilterSize == 1 && filterAlign == 2)

  1512.             filterAlign= 1;

  1513.     }

  1514. 

  1515.     assert(minFilterSize > 0);

  1516.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1517.     assert(filterSize > 0);

  1518.     filter= av_malloc(filterSize*dstW*sizeof(*filter));

  1519.     if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)

  1520.         goto error;

  1521.     *outFilterSize= filterSize;

  1522. 

  1523.     if (flags&SWS_PRINT_INFO)

  1524.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1525.     /* try to reduce the filter-size (step2 reduce it) */

  1526.     for (i=0; i<dstW; i++)

  1527.     {

  1528.         int j;

  1529. 

  1530.         for (j=0; j<filterSize; j++)

  1531.         {

  1532.             if (j>=filter2Size) filter[i*filterSize + j]= 0;

  1533.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1534.             if((flags & SWS_BITEXACT) && j>=minFilterSize)

  1535.                 filter[i*filterSize + j]= 0;

  1536.         }

  1537.     }

  1538. 

  1539. 

  1540.     //FIXME try to align filterPos if possible

  1541. 

  1542.     //fix borders

  1543.     for (i=0; i<dstW; i++)

  1544.     {

  1545.         int j;

  1546.         if ((*filterPos)[i] < 0)

  1547.         {

  1548.             // move filter coefficients left to compensate for filterPos

  1549.             for (j=1; j<filterSize; j++)

  1550.             {

  1551.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1552.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1553.                 filter[i*filterSize + j]=0;

  1554.             }

  1555.             (*filterPos)[i]= 0;

  1556.         }

  1557. 

  1558.         if ((*filterPos)[i] + filterSize > srcW)

  1559.         {

  1560.             int shift= (*filterPos)[i] + filterSize - srcW;

  1561.             // move filter coefficients right to compensate for filterPos

  1562.             for (j=filterSize-2; j>=0; j--)

  1563.             {

  1564.                 int right= FFMIN(j + shift, filterSize-1);

  1565.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1566.                 filter[i*filterSize +j]=0;

  1567.             }

  1568.             (*filterPos)[i]= srcW - filterSize;

  1569.         }

  1570.     }

  1571. 

  1572.     // Note the +1 is for the MMX scaler which reads over the end

  1573.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1574.     *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1575. 

  1576.     /* normalize & store in outFilter */

  1577.     for (i=0; i<dstW; i++)

  1578.     {

  1579.         int j;

  1580.         int64_t error=0;

  1581.         int64_t sum=0;

  1582. 

  1583.         for (j=0; j<filterSize; j++)

  1584.         {

  1585.             sum+= filter[i*filterSize + j];

  1586.         }

  1587.         sum= (sum + one/2)/ one;

  1588.         for (j=0; j<*outFilterSize; j++)

  1589.         {

  1590.             int64_t v= filter[i*filterSize + j] + error;

  1591.             int intV= ROUNDED_DIV(v, sum);

  1592.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1593.             error= v - intV*sum;

  1594.         }

  1595.     }

  1596. 

  1597.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1598.     for (i=0; i<*outFilterSize; i++)

  1599.     {

  1600.         int j= dstW*(*outFilterSize);

  1601.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1602.     }

  1603. 

  1604.     ret=0;

  1605. error:

  1606.     av_free(filter);

  1607.     av_free(filter2);

  1608.     return ret;

  1609. }

  1610. 

  1611. #ifdef COMPILE_MMX2

  1612. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1613. {

  1614.     uint8_t *fragmentA;

  1615.     x86_reg imm8OfPShufW1A;

  1616.     x86_reg imm8OfPShufW2A;

  1617.     x86_reg fragmentLengthA;

  1618.     uint8_t *fragmentB;

  1619.     x86_reg imm8OfPShufW1B;

  1620.     x86_reg imm8OfPShufW2B;

  1621.     x86_reg fragmentLengthB;

  1622.     int fragmentPos;

  1623. 

  1624.     int xpos, i;

  1625. 

  1626.     // create an optimized horizontal scaling routine

  1627. 

  1628.     //code fragment

  1629. 

  1630.     __asm__ volatile(

  1631.         "jmp                         9f                 \n\t"

  1632.     // Begin

  1633.         "0:                                             \n\t"

  1634.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1635.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1636.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1637.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1638.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1639.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1640.         "1:                                             \n\t"

  1641.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1642.         "2:                                             \n\t"

  1643.         "psubw                    %%mm1, %%mm0          \n\t"

  1644.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1645.         "pmullw                   %%mm3, %%mm0          \n\t"

  1646.         "psllw                       $7, %%mm1          \n\t"

  1647.         "paddw                    %%mm1, %%mm0          \n\t"

  1648. 

  1649.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1650. 

  1651.         "add                         $8, %%"REG_a"      \n\t"

  1652.     // End

  1653.         "9:                                             \n\t"

  1654. //        "int $3                                         \n\t"

  1655.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1656.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1657.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1658.         "dec                         %1                 \n\t"

  1659.         "dec                         %2                 \n\t"

  1660.         "sub                         %0, %1             \n\t"

  1661.         "sub                         %0, %2             \n\t"

  1662.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1663.         "sub                         %0, %3             \n\t"

  1664. 

  1665. 

  1666.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1667.         "=r" (fragmentLengthA)

  1668.     );

  1669. 

  1670.     __asm__ volatile(

  1671.         "jmp                         9f                 \n\t"

  1672.     // Begin

  1673.         "0:                                             \n\t"

  1674.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1675.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1676.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1677.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1678.         "1:                                             \n\t"

  1679.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1680.         "2:                                             \n\t"

  1681.         "psubw                    %%mm1, %%mm0          \n\t"

  1682.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1683.         "pmullw                   %%mm3, %%mm0          \n\t"

  1684.         "psllw                       $7, %%mm1          \n\t"

  1685.         "paddw                    %%mm1, %%mm0          \n\t"

  1686. 

  1687.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1688. 

  1689.         "add                         $8, %%"REG_a"      \n\t"

  1690.     // End

  1691.         "9:                                             \n\t"

  1692. //        "int                       $3                   \n\t"

  1693.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1694.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1695.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1696.         "dec                         %1                 \n\t"

  1697.         "dec                         %2                 \n\t"

  1698.         "sub                         %0, %1             \n\t"

  1699.         "sub                         %0, %2             \n\t"

  1700.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1701.         "sub                         %0, %3             \n\t"

  1702. 

  1703. 

  1704.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1705.         "=r" (fragmentLengthB)

  1706.     );

  1707. 

  1708.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1709.     fragmentPos=0;

  1710. 

  1711.     for (i=0; i<dstW/numSplits; i++)

  1712.     {

  1713.         int xx=xpos>>16;

  1714. 

  1715.         if ((i&3) == 0)

  1716.         {

  1717.             int a=0;

  1718.             int b=((xpos+xInc)>>16) - xx;

  1719.             int c=((xpos+xInc*2)>>16) - xx;

  1720.             int d=((xpos+xInc*3)>>16) - xx;

  1721. 

  1722.             filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1723.             filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1724.             filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1725.             filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1726.             filterPos[i/2]= xx;

  1727. 

  1728.             if (d+1<4)

  1729.             {

  1730.                 int maxShift= 3-(d+1);

  1731.                 int shift=0;

  1732. 

  1733.                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1734. 

  1735.                 funnyCode[fragmentPos + imm8OfPShufW1B]=

  1736.                     (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1737.                 funnyCode[fragmentPos + imm8OfPShufW2B]=

  1738.                     a | (b<<2) | (c<<4) | (d<<6);

  1739. 

  1740.                 if (i+3>=dstW) shift=maxShift; //avoid overread

  1741.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1742. 

  1743.                 if (shift && i>=shift)

  1744.                 {

  1745.                     funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1746.                     funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1747.                     filterPos[i/2]-=shift;

  1748.                 }

  1749. 

  1750.                 fragmentPos+= fragmentLengthB;

  1751.             }

  1752.             else

  1753.             {

  1754.                 int maxShift= 3-d;

  1755.                 int shift=0;

  1756. 

  1757.                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1758. 

  1759.                 funnyCode[fragmentPos + imm8OfPShufW1A]=

  1760.                 funnyCode[fragmentPos + imm8OfPShufW2A]=

  1761.                     a | (b<<2) | (c<<4) | (d<<6);

  1762. 

  1763.                 if (i+4>=dstW) shift=maxShift; //avoid overread

  1764.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1765. 

  1766.                 if (shift && i>=shift)

  1767.                 {

  1768.                     funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1769.                     funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1770.                     filterPos[i/2]-=shift;

  1771.                 }

  1772. 

  1773.                 fragmentPos+= fragmentLengthA;

  1774.             }

  1775. 

  1776.             funnyCode[fragmentPos]= RET;

  1777.         }

  1778.         xpos+=xInc;

  1779.     }

  1780.     filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part

  1781. }

  1782. #endif /* COMPILE_MMX2 */

  1783. 

  1784. static void globalInit(void){

  1785.     // generating tables:

  1786.     int i;

  1787.     for (i=0; i<768; i++){

  1788.         int c= av_clip_uint8(i-256);

  1789.         clip_table[i]=c;

  1790.     }

  1791. }

  1792. 

  1793. static SwsFunc getSwsFunc(SwsContext *c)

  1794. {

  1795.     int flags = c->flags;

  1796. 

  1797. #if CONFIG_RUNTIME_CPUDETECT && CONFIG_GPL

  1798. #if ARCH_X86

  1799.     // ordered per speed fastest first

  1800.     if (flags & SWS_CPU_CAPS_MMX2) {

  1801.         sws_init_swScale_MMX2(c);

  1802.         return swScale_MMX2;

  1803.     } else if (flags & SWS_CPU_CAPS_3DNOW) {

  1804.         sws_init_swScale_3DNow(c);

  1805.         return swScale_3DNow;

  1806.     } else if (flags & SWS_CPU_CAPS_MMX) {

  1807.         sws_init_swScale_MMX(c);

  1808.         return swScale_MMX;

  1809.     } else {

  1810.         sws_init_swScale_C(c);

  1811.         return swScale_C;

  1812.     }

  1813. 

  1814. #else

  1815. #if ARCH_PPC

  1816.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1817.         sws_init_swScale_altivec(c);

  1818.         return swScale_altivec;

  1819.     } else {

  1820.         sws_init_swScale_C(c);

  1821.         return swScale_C;

  1822.     }

  1823. #endif

  1824.     sws_init_swScale_C(c);

  1825.     return swScale_C;

  1826. #endif /* ARCH_X86 */

  1827. #else //CONFIG_RUNTIME_CPUDETECT

  1828. #if   HAVE_MMX2

  1829.     sws_init_swScale_MMX2(c);

  1830.     return swScale_MMX2;

  1831. #elif HAVE_AMD3DNOW

  1832.     sws_init_swScale_3DNow(c);

  1833.     return swScale_3DNow;

  1834. #elif HAVE_MMX

  1835.     sws_init_swScale_MMX(c);

  1836.     return swScale_MMX;

  1837. #elif HAVE_ALTIVEC

  1838.     sws_init_swScale_altivec(c);

  1839.     return swScale_altivec;

  1840. #else

  1841.     sws_init_swScale_C(c);

  1842.     return swScale_C;

  1843. #endif

  1844. #endif //!CONFIG_RUNTIME_CPUDETECT

  1845. }

  1846. 

  1847. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1848.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1849.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1850.     /* Copy Y plane */

  1851.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1852.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1853.     else

  1854.     {

  1855.         int i;

  1856.         const uint8_t *srcPtr= src[0];

  1857.         uint8_t *dstPtr= dst;

  1858.         for (i=0; i<srcSliceH; i++)

  1859.         {

  1860.             memcpy(dstPtr, srcPtr, c->srcW);

  1861.             srcPtr+= srcStride[0];

  1862.             dstPtr+= dstStride[0];

  1863.         }

  1864.     }

  1865.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1866.     if (c->dstFormat == PIX_FMT_NV12)

  1867.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1868.     else

  1869.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1870. 

  1871.     return srcSliceH;

  1872. }

  1873. 

  1874. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1875.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1876.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1877. 

  1878.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1879. 

  1880.     return srcSliceH;

  1881. }

  1882. 

  1883. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1884.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1885.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1886. 

  1887.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1888. 

  1889.     return srcSliceH;

  1890. }

  1891. 

  1892. static int YUV422PToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1893.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1894.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1895. 

  1896.     yuv422ptoyuy2(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1897. 

  1898.     return srcSliceH;

  1899. }

  1900. 

  1901. static int YUV422PToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1902.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1903.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1904. 

  1905.     yuv422ptouyvy(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1906. 

  1907.     return srcSliceH;

  1908. }

  1909. 

  1910. static int YUYV2YUV420Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1911.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1912.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1913.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;

  1914.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;

  1915. 

  1916.     yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1917. 

  1918.     if (dstParam[3])

  1919.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  1920. 

  1921.     return srcSliceH;

  1922. }

  1923. 

  1924. static int YUYV2YUV422Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1925.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1926.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1927.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;

  1928.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;

  1929. 

  1930.     yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1931. 

  1932.     return srcSliceH;

  1933. }

  1934. 

  1935. static int UYVY2YUV420Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1936.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1937.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1938.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;

  1939.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;

  1940. 

  1941.     uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1942. 

  1943.     if (dstParam[3])

  1944.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  1945. 

  1946.     return srcSliceH;

  1947. }

  1948. 

  1949. static int UYVY2YUV422Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1950.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1951.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1952.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;

  1953.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;

  1954. 

  1955.     uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1956. 

  1957.     return srcSliceH;

  1958. }

  1959. 

  1960. static int pal2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1961.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1962.     const enum PixelFormat srcFormat= c->srcFormat;

  1963.     const enum PixelFormat dstFormat= c->dstFormat;

  1964.     void (*conv)(const uint8_t *src, uint8_t *dst, long num_pixels,

  1965.                  const uint8_t *palette)=NULL;

  1966.     int i;

  1967.     uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1968.     uint8_t *srcPtr= src[0];

  1969. 

  1970.     if (!usePal(srcFormat))

  1971.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1972.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  1973. 

  1974.     switch(dstFormat){

  1975.     case PIX_FMT_RGB32  : conv = palette8topacked32; break;

  1976.     case PIX_FMT_BGR32  : conv = palette8topacked32; break;

  1977.     case PIX_FMT_BGR32_1: conv = palette8topacked32; break;

  1978.     case PIX_FMT_RGB32_1: conv = palette8topacked32; break;

  1979.     case PIX_FMT_RGB24  : conv = palette8topacked24; break;

  1980.     case PIX_FMT_BGR24  : conv = palette8topacked24; break;

  1981.     default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1982.                     sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1983.     }

  1984. 

  1985. 

  1986.     for (i=0; i<srcSliceH; i++) {

  1987.         conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);

  1988.         srcPtr+= srcStride[0];

  1989.         dstPtr+= dstStride[0];

  1990.     }

  1991. 

  1992.     return srcSliceH;

  1993. }

  1994. 

  1995. /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */

  1996. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1997.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1998.     const enum PixelFormat srcFormat= c->srcFormat;

  1999.     const enum PixelFormat dstFormat= c->dstFormat;

  2000.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  2001.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  2002.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  2003.     const int dstId= fmt_depth(dstFormat) >> 2;

  2004.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  2005. 

  2006.     /* BGR -> BGR */

  2007.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  2008.        || (isRGB(srcFormat) && isRGB(dstFormat))){

  2009.         switch(srcId | (dstId<<4)){

  2010.         case 0x34: conv= rgb16to15; break;

  2011.         case 0x36: conv= rgb24to15; break;

  2012.         case 0x38: conv= rgb32to15; break;

  2013.         case 0x43: conv= rgb15to16; break;

  2014.         case 0x46: conv= rgb24to16; break;

  2015.         case 0x48: conv= rgb32to16; break;

  2016.         case 0x63: conv= rgb15to24; break;

  2017.         case 0x64: conv= rgb16to24; break;

  2018.         case 0x68: conv= rgb32to24; break;

  2019.         case 0x83: conv= rgb15to32; break;

  2020.         case 0x84: conv= rgb16to32; break;

  2021.         case 0x86: conv= rgb24to32; break;

  2022.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2023.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  2024.         }

  2025.     }else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  2026.              || (isRGB(srcFormat) && isBGR(dstFormat))){

  2027.         switch(srcId | (dstId<<4)){

  2028.         case 0x33: conv= rgb15tobgr15; break;

  2029.         case 0x34: conv= rgb16tobgr15; break;

  2030.         case 0x36: conv= rgb24tobgr15; break;

  2031.         case 0x38: conv= rgb32tobgr15; break;

  2032.         case 0x43: conv= rgb15tobgr16; break;

  2033.         case 0x44: conv= rgb16tobgr16; break;

  2034.         case 0x46: conv= rgb24tobgr16; break;

  2035.         case 0x48: conv= rgb32tobgr16; break;

  2036.         case 0x63: conv= rgb15tobgr24; break;

  2037.         case 0x64: conv= rgb16tobgr24; break;

  2038.         case 0x66: conv= rgb24tobgr24; break;

  2039.         case 0x68: conv= rgb32tobgr24; break;

  2040.         case 0x83: conv= rgb15tobgr32; break;

  2041.         case 0x84: conv= rgb16tobgr32; break;

  2042.         case 0x86: conv= rgb24tobgr32; break;

  2043.         case 0x88: conv= rgb32tobgr32; break;

  2044.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2045.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  2046.         }

  2047.     }else{

  2048.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2049.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  2050.     }

  2051. 

  2052.     if(conv)

  2053.     {

  2054.         uint8_t *srcPtr= src[0];

  2055.         if(srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1)

  2056.             srcPtr += ALT32_CORR;

  2057. 

  2058.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  2059.             conv(srcPtr, dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  2060.         else

  2061.         {

  2062.             int i;

  2063.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2064. 

  2065.             for (i=0; i<srcSliceH; i++)

  2066.             {

  2067.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  2068.                 srcPtr+= srcStride[0];

  2069.                 dstPtr+= dstStride[0];

  2070.             }

  2071.         }

  2072.     }

  2073.     return srcSliceH;

  2074. }

  2075. 

  2076. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2077.                               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2078. 

  2079.     rgb24toyv12(

  2080.         src[0],

  2081.         dst[0]+ srcSliceY    *dstStride[0],

  2082.         dst[1]+(srcSliceY>>1)*dstStride[1],

  2083.         dst[2]+(srcSliceY>>1)*dstStride[2],

  2084.         c->srcW, srcSliceH,

  2085.         dstStride[0], dstStride[1], srcStride[0]);

  2086.     if (dst[3])

  2087.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2088.     return srcSliceH;

  2089. }

  2090. 

  2091. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2092.                              int srcSliceH, uint8_t* dst[], int dstStride[]){

  2093.     int i;

  2094. 

  2095.     /* copy Y */

  2096.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  2097.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  2098.     else{

  2099.         uint8_t *srcPtr= src[0];

  2100.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2101. 

  2102.         for (i=0; i<srcSliceH; i++)

  2103.         {

  2104.             memcpy(dstPtr, srcPtr, c->srcW);

  2105.             srcPtr+= srcStride[0];

  2106.             dstPtr+= dstStride[0];

  2107.         }

  2108.     }

  2109. 

  2110.     if (c->dstFormat==PIX_FMT_YUV420P || c->dstFormat==PIX_FMT_YUVA420P){

  2111.         planar2x(src[1], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,

  2112.                  srcSliceH >> 2, srcStride[1], dstStride[1]);

  2113.         planar2x(src[2], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,

  2114.                  srcSliceH >> 2, srcStride[2], dstStride[2]);

  2115.     }else{

  2116.         planar2x(src[1], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,

  2117.                  srcSliceH >> 2, srcStride[1], dstStride[2]);

  2118.         planar2x(src[2], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,

  2119.                  srcSliceH >> 2, srcStride[2], dstStride[1]);

  2120.     }

  2121.     if (dst[3])

  2122.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2123.     return srcSliceH;

  2124. }

  2125. 

  2126. /* unscaled copy like stuff (assumes nearly identical formats) */

  2127. static int packedCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2128.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  2129. {

  2130.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  2131.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  2132.     else

  2133.     {

  2134.         int i;

  2135.         uint8_t *srcPtr= src[0];

  2136.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2137.         int length=0;

  2138. 

  2139.         /* universal length finder */

  2140.         while(length+c->srcW <= FFABS(dstStride[0])

  2141.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  2142.         assert(length!=0);

  2143. 

  2144.         for (i=0; i<srcSliceH; i++)

  2145.         {

  2146.             memcpy(dstPtr, srcPtr, length);

  2147.             srcPtr+= srcStride[0];

  2148.             dstPtr+= dstStride[0];

  2149.         }

  2150.     }

  2151.     return srcSliceH;

  2152. }

  2153. 

  2154. static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2155.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  2156. {

  2157.     int plane, i, j;

  2158.     for (plane=0; plane<4; plane++)

  2159.     {

  2160.         int length= (plane==0 || plane==3) ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  2161.         int y=      (plane==0 || plane==3) ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  2162.         int height= (plane==0 || plane==3) ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  2163.         uint8_t *srcPtr= src[plane];

  2164.         uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  2165. 

  2166.         if (!dst[plane]) continue;

  2167.         // ignore palette for GRAY8

  2168.         if (plane == 1 && !dst[2]) continue;

  2169.         if (!src[plane] || (plane == 1 && !src[2])){

  2170.             if(is16BPS(c->dstFormat))

  2171.                 length*=2;

  2172.             fillPlane(dst[plane], dstStride[plane], length, height, y, (plane==3) ? 255 : 128);

  2173.         }else

  2174.         {

  2175.             if(is16BPS(c->srcFormat) && !is16BPS(c->dstFormat)){

  2176.                 if (!isBE(c->srcFormat)) srcPtr++;

  2177.                 for (i=0; i<height; i++){

  2178.                     for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  2179.                     srcPtr+= srcStride[plane];

  2180.                     dstPtr+= dstStride[plane];

  2181.                 }

  2182.             }else if(!is16BPS(c->srcFormat) && is16BPS(c->dstFormat)){

  2183.                 for (i=0; i<height; i++){

  2184.                     for (j=0; j<length; j++){

  2185.                         dstPtr[ j<<1   ] = srcPtr[j];

  2186.                         dstPtr[(j<<1)+1] = srcPtr[j];

  2187.                     }

  2188.                     srcPtr+= srcStride[plane];

  2189.                     dstPtr+= dstStride[plane];

  2190.                 }

  2191.             }else if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat)

  2192.                   && isBE(c->srcFormat) != isBE(c->dstFormat)){

  2193. 

  2194.                 for (i=0; i<height; i++){

  2195.                     for (j=0; j<length; j++)

  2196.                         ((uint16_t*)dstPtr)[j] = bswap_16(((uint16_t*)srcPtr)[j]);

  2197.                     srcPtr+= srcStride[plane];

  2198.                     dstPtr+= dstStride[plane];

  2199.                 }

  2200.             } else if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  2201.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  2202.             else

  2203.             {

  2204.                 if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat))

  2205.                     length*=2;

  2206.                 for (i=0; i<height; i++)

  2207.                 {

  2208.                     memcpy(dstPtr, srcPtr, length);

  2209.                     srcPtr+= srcStride[plane];

  2210.                     dstPtr+= dstStride[plane];

  2211.                 }

  2212.             }

  2213.         }

  2214.     }

  2215.     return srcSliceH;

  2216. }

  2217. 

  2218. 

  2219. static void getSubSampleFactors(int *h, int *v, int format){

  2220.     switch(format){

  2221.     case PIX_FMT_UYVY422:

  2222.     case PIX_FMT_YUYV422:

  2223.         *h=1;

  2224.         *v=0;

  2225.         break;

  2226.     case PIX_FMT_YUV420P:

  2227.     case PIX_FMT_YUV420PLE:

  2228.     case PIX_FMT_YUV420PBE:

  2229.     case PIX_FMT_YUVA420P:

  2230.     case PIX_FMT_GRAY16BE:

  2231.     case PIX_FMT_GRAY16LE:

  2232.     case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  2233.     case PIX_FMT_NV12:

  2234.     case PIX_FMT_NV21:

  2235.         *h=1;

  2236.         *v=1;

  2237.         break;

  2238.     case PIX_FMT_YUV440P:

  2239.         *h=0;

  2240.         *v=1;

  2241.         break;

  2242.     case PIX_FMT_YUV410P:

  2243.         *h=2;

  2244.         *v=2;

  2245.         break;

  2246.     case PIX_FMT_YUV444P:

  2247.     case PIX_FMT_YUV444PLE:

  2248.     case PIX_FMT_YUV444PBE:

  2249.         *h=0;

  2250.         *v=0;

  2251.         break;

  2252.     case PIX_FMT_YUV422P:

  2253.     case PIX_FMT_YUV422PLE:

  2254.     case PIX_FMT_YUV422PBE:

  2255.         *h=1;

  2256.         *v=0;

  2257.         break;

  2258.     case PIX_FMT_YUV411P:

  2259.         *h=2;

  2260.         *v=0;

  2261.         break;

  2262.     default:

  2263.         *h=0;

  2264.         *v=0;

  2265.         break;

  2266.     }

  2267. }

  2268. 

  2269. static uint16_t roundToInt16(int64_t f){

  2270.     int r= (f + (1<<15))>>16;

  2271.          if (r<-0x7FFF) return 0x8000;

  2272.     else if (r> 0x7FFF) return 0x7FFF;

  2273.     else                return r;

  2274. }

  2275. 

  2276. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  2277.     int64_t crv =  inv_table[0];

  2278.     int64_t cbu =  inv_table[1];

  2279.     int64_t cgu = -inv_table[2];

  2280.     int64_t cgv = -inv_table[3];

  2281.     int64_t cy  = 1<<16;

  2282.     int64_t oy  = 0;

  2283. 

  2284.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  2285.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  2286. 

  2287.     c->brightness= brightness;

  2288.     c->contrast  = contrast;

  2289.     c->saturation= saturation;

  2290.     c->srcRange  = srcRange;

  2291.     c->dstRange  = dstRange;

  2292.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2293. 

  2294.     c->uOffset=   0x0400040004000400LL;

  2295.     c->vOffset=   0x0400040004000400LL;

  2296. 

  2297.     if (!srcRange){

  2298.         cy= (cy*255) / 219;

  2299.         oy= 16<<16;

  2300.     }else{

  2301.         crv= (crv*224) / 255;

  2302.         cbu= (cbu*224) / 255;

  2303.         cgu= (cgu*224) / 255;

  2304.         cgv= (cgv*224) / 255;

  2305.     }

  2306. 

  2307.     cy = (cy *contrast             )>>16;

  2308.     crv= (crv*contrast * saturation)>>32;

  2309.     cbu= (cbu*contrast * saturation)>>32;

  2310.     cgu= (cgu*contrast * saturation)>>32;

  2311.     cgv= (cgv*contrast * saturation)>>32;

  2312. 

  2313.     oy -= 256*brightness;

  2314. 

  2315.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  2316.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  2317.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  2318.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  2319.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  2320.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  2321. 

  2322.     c->yuv2rgb_y_coeff  = (int16_t)roundToInt16(cy <<13);

  2323.     c->yuv2rgb_y_offset = (int16_t)roundToInt16(oy << 9);

  2324.     c->yuv2rgb_v2r_coeff= (int16_t)roundToInt16(crv<<13);

  2325.     c->yuv2rgb_v2g_coeff= (int16_t)roundToInt16(cgv<<13);

  2326.     c->yuv2rgb_u2g_coeff= (int16_t)roundToInt16(cgu<<13);

  2327.     c->yuv2rgb_u2b_coeff= (int16_t)roundToInt16(cbu<<13);

  2328. 

  2329.     ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  2330.     //FIXME factorize

  2331. 

  2332. #ifdef COMPILE_ALTIVEC

  2333.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  2334.         ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);

  2335. #endif

  2336.     return 0;

  2337. }

  2338. 

  2339. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  2340.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2341. 

  2342.     *inv_table = c->srcColorspaceTable;

  2343.     *table     = c->dstColorspaceTable;

  2344.     *srcRange  = c->srcRange;

  2345.     *dstRange  = c->dstRange;

  2346.     *brightness= c->brightness;

  2347.     *contrast  = c->contrast;

  2348.     *saturation= c->saturation;

  2349. 

  2350.     return 0;

  2351. }

  2352. 

  2353. static int handle_jpeg(enum PixelFormat *format)

  2354. {

  2355.     switch (*format) {

  2356.         case PIX_FMT_YUVJ420P:

  2357.             *format = PIX_FMT_YUV420P;

  2358.             return 1;

  2359.         case PIX_FMT_YUVJ422P:

  2360.             *format = PIX_FMT_YUV422P;

  2361.             return 1;

  2362.         case PIX_FMT_YUVJ444P:

  2363.             *format = PIX_FMT_YUV444P;

  2364.             return 1;

  2365.         case PIX_FMT_YUVJ440P:

  2366.             *format = PIX_FMT_YUV440P;

  2367.             return 1;

  2368.         default:

  2369.             return 0;

  2370.     }

  2371. }

  2372. 

  2373. SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  2374.                            SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  2375. 

  2376.     SwsContext *c;

  2377.     int i;

  2378.     int usesVFilter, usesHFilter;

  2379.     int unscaled, needsDither;

  2380.     int srcRange, dstRange;

  2381.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  2382. #if ARCH_X86

  2383.     if (flags & SWS_CPU_CAPS_MMX)

  2384.         __asm__ volatile("emms\n\t"::: "memory");

  2385. #endif

  2386. 

  2387. #if !CONFIG_RUNTIME_CPUDETECT || !CONFIG_GPL //ensure that the flags match the compiled variant if cpudetect is off

  2388.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  2389. #if   HAVE_MMX2

  2390.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  2391. #elif HAVE_AMD3DNOW

  2392.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  2393. #elif HAVE_MMX

  2394.     flags |= SWS_CPU_CAPS_MMX;

  2395. #elif HAVE_ALTIVEC

  2396.     flags |= SWS_CPU_CAPS_ALTIVEC;

  2397. #elif ARCH_BFIN

  2398.     flags |= SWS_CPU_CAPS_BFIN;

  2399. #endif

  2400. #endif /* CONFIG_RUNTIME_CPUDETECT */

  2401.     if (clip_table[512] != 255) globalInit();

  2402.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2403. 

  2404.     unscaled = (srcW == dstW && srcH == dstH);

  2405.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2406.         && (fmt_depth(dstFormat))<24

  2407.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2408. 

  2409.     srcRange = handle_jpeg(&srcFormat);

  2410.     dstRange = handle_jpeg(&dstFormat);

  2411. 

  2412.     if (!isSupportedIn(srcFormat))

  2413.     {

  2414.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2415.         return NULL;

  2416.     }

  2417.     if (!isSupportedOut(dstFormat))

  2418.     {

  2419.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));

  2420.         return NULL;

  2421.     }

  2422. 

  2423.     i= flags & ( SWS_POINT

  2424.                 |SWS_AREA

  2425.                 |SWS_BILINEAR

  2426.                 |SWS_FAST_BILINEAR

  2427.                 |SWS_BICUBIC

  2428.                 |SWS_X

  2429.                 |SWS_GAUSS

  2430.                 |SWS_LANCZOS

  2431.                 |SWS_SINC

  2432.                 |SWS_SPLINE

  2433.                 |SWS_BICUBLIN);

  2434.     if(!i || (i & (i-1)))

  2435.     {

  2436.         av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n");

  2437.         return NULL;

  2438.     }

  2439. 

  2440.     /* sanity check */

  2441.     if (srcW<4 || srcH<1 || dstW<8 || dstH<1) //FIXME check if these are enough and try to lowwer them after fixing the relevant parts of the code

  2442.     {

  2443.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2444.                srcW, srcH, dstW, dstH);

  2445.         return NULL;

  2446.     }

  2447.     if(srcW > VOFW || dstW > VOFW){

  2448.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile-time maximum width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  2449.         return NULL;

  2450.     }

  2451. 

  2452.     if (!dstFilter) dstFilter= &dummyFilter;

  2453.     if (!srcFilter) srcFilter= &dummyFilter;

  2454. 

  2455.     c= av_mallocz(sizeof(SwsContext));

  2456. 

  2457.     c->av_class = &sws_context_class;

  2458.     c->srcW= srcW;

  2459.     c->srcH= srcH;

  2460.     c->dstW= dstW;

  2461.     c->dstH= dstH;

  2462.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2463.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2464.     c->flags= flags;

  2465.     c->dstFormat= dstFormat;

  2466.     c->srcFormat= srcFormat;

  2467.     c->vRounder= 4* 0x0001000100010001ULL;

  2468. 

  2469.     usesHFilter= usesVFilter= 0;

  2470.     if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;

  2471.     if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;

  2472.     if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;

  2473.     if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;

  2474.     if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;

  2475.     if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;

  2476.     if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;

  2477.     if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;

  2478. 

  2479.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2480.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2481. 

  2482.     // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation

  2483.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2484. 

  2485.     // drop some chroma lines if the user wants it

  2486.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2487.     c->chrSrcVSubSample+= c->vChrDrop;

  2488. 

  2489.     // drop every other pixel for chroma calculation unless user wants full chroma

  2490.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2491.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2492.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2493.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE

  2494.       && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2495.         c->chrSrcHSubSample=1;

  2496. 

  2497.     if (param){

  2498.         c->param[0] = param[0];

  2499.         c->param[1] = param[1];

  2500.     }else{

  2501.         c->param[0] =

  2502.         c->param[1] = SWS_PARAM_DEFAULT;

  2503.     }

  2504. 

  2505.     c->chrIntHSubSample= c->chrDstHSubSample;

  2506.     c->chrIntVSubSample= c->chrSrcVSubSample;

  2507. 

  2508.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2509.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2510.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2511.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2512.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2513. 

  2514.     sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16);

  2515. 

  2516.     /* unscaled special cases */

  2517.     if (unscaled && !usesHFilter && !usesVFilter && (srcRange == dstRange || isBGR(dstFormat) || isRGB(dstFormat)))

  2518.     {

  2519.         /* yv12_to_nv12 */

  2520.         if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2521.         {

  2522.             c->swScale= PlanarToNV12Wrapper;

  2523.         }

  2524.         /* yuv2bgr */

  2525.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P || srcFormat==PIX_FMT_YUVA420P) && (isBGR(dstFormat) || isRGB(dstFormat))

  2526.             && !(flags & SWS_ACCURATE_RND) && !(dstH&1))

  2527.         {

  2528.             c->swScale= ff_yuv2rgb_get_func_ptr(c);

  2529.         }

  2530. 

  2531.         if (srcFormat==PIX_FMT_YUV410P && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_BITEXACT))

  2532.         {

  2533.             c->swScale= yvu9toyv12Wrapper;

  2534.         }

  2535. 

  2536.         /* bgr24toYV12 */

  2537.         if (srcFormat==PIX_FMT_BGR24 && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_ACCURATE_RND))

  2538.             c->swScale= bgr24toyv12Wrapper;

  2539. 

  2540.         /* RGB/BGR -> RGB/BGR (no dither needed forms) */

  2541.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2542.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2543.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2544.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2545.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2546.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2547.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2548.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2549.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2550.            && srcFormat != PIX_FMT_MONOWHITE && dstFormat != PIX_FMT_MONOWHITE

  2551.                                              && dstFormat != PIX_FMT_RGB32_1

  2552.                                              && dstFormat != PIX_FMT_BGR32_1

  2553.            && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2554.              c->swScale= rgb2rgbWrapper;

  2555. 

  2556.         if ((usePal(srcFormat) && (

  2557.                  dstFormat == PIX_FMT_RGB32   ||

  2558.                  dstFormat == PIX_FMT_RGB32_1 ||

  2559.                  dstFormat == PIX_FMT_RGB24   ||

  2560.                  dstFormat == PIX_FMT_BGR32   ||

  2561.                  dstFormat == PIX_FMT_BGR32_1 ||

  2562.                  dstFormat == PIX_FMT_BGR24)))

  2563.              c->swScale= pal2rgbWrapper;

  2564. 

  2565.         if (srcFormat == PIX_FMT_YUV422P)

  2566.         {

  2567.             if (dstFormat == PIX_FMT_YUYV422)

  2568.                 c->swScale= YUV422PToYuy2Wrapper;

  2569.             else if (dstFormat == PIX_FMT_UYVY422)

  2570.                 c->swScale= YUV422PToUyvyWrapper;

  2571.         }

  2572. 

  2573.         /* LQ converters if -sws 0 or -sws 4*/

  2574.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2575.             /* yv12_to_yuy2 */

  2576.             if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P)

  2577.             {

  2578.                 if (dstFormat == PIX_FMT_YUYV422)

  2579.                     c->swScale= PlanarToYuy2Wrapper;

  2580.                 else if (dstFormat == PIX_FMT_UYVY422)

  2581.                     c->swScale= PlanarToUyvyWrapper;

  2582.             }

  2583.         }

  2584.         if(srcFormat == PIX_FMT_YUYV422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  2585.             c->swScale= YUYV2YUV420Wrapper;

  2586.         if(srcFormat == PIX_FMT_UYVY422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  2587.             c->swScale= UYVY2YUV420Wrapper;

  2588.         if(srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)

  2589.             c->swScale= YUYV2YUV422Wrapper;

  2590.         if(srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)

  2591.             c->swScale= UYVY2YUV422Wrapper;

  2592. 

  2593. #ifdef COMPILE_ALTIVEC

  2594.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2595.             !(c->flags & SWS_BITEXACT) &&

  2596.             srcFormat == PIX_FMT_YUV420P) {

  2597.           // unscaled YV12 -> packed YUV, we want speed

  2598.           if (dstFormat == PIX_FMT_YUYV422)

  2599.               c->swScale= yv12toyuy2_unscaled_altivec;

  2600.           else if (dstFormat == PIX_FMT_UYVY422)

  2601.               c->swScale= yv12touyvy_unscaled_altivec;

  2602.         }

  2603. #endif

  2604. 

  2605.         /* simple copy */

  2606.         if (  srcFormat == dstFormat

  2607.             || (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P)

  2608.             || (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P)

  2609.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2610.             || (isPlanarYUV(dstFormat) && isGray(srcFormat))

  2611.             || (isGray(dstFormat) && isGray(srcFormat))

  2612.             || (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat)

  2613.                 && c->chrDstHSubSample == c->chrSrcHSubSample

  2614.                 && c->chrDstVSubSample == c->chrSrcVSubSample))

  2615.         {

  2616.             if (isPacked(c->srcFormat))

  2617.                 c->swScale= packedCopy;

  2618.             else /* Planar YUV or gray */

  2619.                 c->swScale= planarCopy;

  2620.         }

  2621. #if ARCH_BFIN

  2622.         if (flags & SWS_CPU_CAPS_BFIN)

  2623.             ff_bfin_get_unscaled_swscale (c);

  2624. #endif

  2625. 

  2626.         if (c->swScale){

  2627.             if (flags&SWS_PRINT_INFO)

  2628.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2629.                                 sws_format_name(srcFormat), sws_format_name(dstFormat));

  2630.             return c;

  2631.         }

  2632.     }

  2633. 

  2634.     if (flags & SWS_CPU_CAPS_MMX2)

  2635.     {

  2636.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2637.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2638.         {

  2639.             if (flags&SWS_PRINT_INFO)

  2640.                 av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");

  2641.         }

  2642.         if (usesHFilter) c->canMMX2BeUsed=0;

  2643.     }

  2644.     else

  2645.         c->canMMX2BeUsed=0;

  2646. 

  2647.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2648.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2649. 

  2650.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2651.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2652.     // n-2 is the last chrominance sample available

  2653.     // this is not perfect, but no one should notice the difference, the more correct variant

  2654.     // would be like the vertical one, but that would require some special code for the

  2655.     // first and last pixel

  2656.     if (flags&SWS_FAST_BILINEAR)

  2657.     {

  2658.         if (c->canMMX2BeUsed)

  2659.         {

  2660.             c->lumXInc+= 20;

  2661.             c->chrXInc+= 20;

  2662.         }

  2663.         //we don't use the x86 asm scaler if MMX is available

  2664.         else if (flags & SWS_CPU_CAPS_MMX)

  2665.         {

  2666.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2667.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2668.         }

  2669.     }

  2670. 

  2671.     /* precalculate horizontal scaler filter coefficients */

  2672.     {

  2673.         const int filterAlign=

  2674.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2675.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2676.             1;

  2677. 

  2678.         initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2679.                    srcW      ,       dstW, filterAlign, 1<<14,

  2680.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2681.                    srcFilter->lumH, dstFilter->lumH, c->param);

  2682.         initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2683.                    c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2684.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2685.                    srcFilter->chrH, dstFilter->chrH, c->param);

  2686. 

  2687. #define MAX_FUNNY_CODE_SIZE 10000

  2688. #if defined(COMPILE_MMX2)

  2689. // can't downscale !!!

  2690.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2691.         {

  2692. #ifdef MAP_ANONYMOUS

  2693.             c->funnyYCode  = mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2694.             c->funnyUVCode = mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2695. #elif HAVE_VIRTUALALLOC

  2696.             c->funnyYCode  = VirtualAlloc(NULL, MAX_FUNNY_CODE_SIZE, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  2697.             c->funnyUVCode = VirtualAlloc(NULL, MAX_FUNNY_CODE_SIZE, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  2698. #else

  2699.             c->funnyYCode  = av_malloc(MAX_FUNNY_CODE_SIZE);

  2700.             c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2701. #endif

  2702. 

  2703.             c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2704.             c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2705.             c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2706.             c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2707. 

  2708.             initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2709.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2710.         }

  2711. #endif /* defined(COMPILE_MMX2) */

  2712.     } // initialize horizontal stuff

  2713. 

  2714. 

  2715. 

  2716.     /* precalculate vertical scaler filter coefficients */

  2717.     {

  2718.         const int filterAlign=

  2719.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2720.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2721.             1;

  2722. 

  2723.         initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2724.                    srcH      ,        dstH, filterAlign, (1<<12),

  2725.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2726.                    srcFilter->lumV, dstFilter->lumV, c->param);

  2727.         initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2728.                    c->chrSrcH, c->chrDstH, filterAlign, (1<<12),

  2729.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2730.                    srcFilter->chrV, dstFilter->chrV, c->param);

  2731. 

  2732. #if HAVE_ALTIVEC

  2733.         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2734.         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2735. 

  2736.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2737.             int j;

  2738.             short *p = (short *)&c->vYCoeffsBank[i];

  2739.             for (j=0;j<8;j++)

  2740.                 p[j] = c->vLumFilter[i];

  2741.         }

  2742. 

  2743.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2744.             int j;

  2745.             short *p = (short *)&c->vCCoeffsBank[i];

  2746.             for (j=0;j<8;j++)

  2747.                 p[j] = c->vChrFilter[i];

  2748.         }

  2749. #endif

  2750.     }

  2751. 

  2752.     // calculate buffer sizes so that they won't run out while handling these damn slices

  2753.     c->vLumBufSize= c->vLumFilterSize;

  2754.     c->vChrBufSize= c->vChrFilterSize;

  2755.     for (i=0; i<dstH; i++)

  2756.     {

  2757.         int chrI= i*c->chrDstH / dstH;

  2758.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2759.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2760. 

  2761.         nextSlice>>= c->chrSrcVSubSample;

  2762.         nextSlice<<= c->chrSrcVSubSample;

  2763.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2764.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2765.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2766.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2767.     }

  2768. 

  2769.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2770.     c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2771.     c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2772.     if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))

  2773.         c->alpPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2774.     //Note we need at least one pixel more at the end because of the MMX code (just in case someone wanna replace the 4000/8000)

  2775.     /* align at 16 bytes for AltiVec */

  2776.     for (i=0; i<c->vLumBufSize; i++)

  2777.         c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2778.     for (i=0; i<c->vChrBufSize; i++)

  2779.         c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc((VOF+1)*2);

  2780.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)

  2781.         for (i=0; i<c->vLumBufSize; i++)

  2782.             c->alpPixBuf[i]= c->alpPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2783. 

  2784.     //try to avoid drawing green stuff between the right end and the stride end

  2785.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2786. 

  2787.     assert(2*VOFW == VOF);

  2788. 

  2789.     assert(c->chrDstH <= dstH);

  2790. 

  2791.     if (flags&SWS_PRINT_INFO)

  2792.     {

  2793. #ifdef DITHER1XBPP

  2794.         const char *dither= " dithered";

  2795. #else

  2796.         const char *dither= "";

  2797. #endif

  2798.         if (flags&SWS_FAST_BILINEAR)

  2799.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2800.         else if (flags&SWS_BILINEAR)

  2801.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2802.         else if (flags&SWS_BICUBIC)

  2803.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2804.         else if (flags&SWS_X)

  2805.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2806.         else if (flags&SWS_POINT)

  2807.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2808.         else if (flags&SWS_AREA)

  2809.             av_log(c, AV_LOG_INFO, "Area Averageing scaler, ");

  2810.         else if (flags&SWS_BICUBLIN)

  2811.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2812.         else if (flags&SWS_GAUSS)

  2813.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2814.         else if (flags&SWS_SINC)

  2815.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2816.         else if (flags&SWS_LANCZOS)

  2817.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2818.         else if (flags&SWS_SPLINE)

  2819.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2820.         else

  2821.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2822. 

  2823.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2824.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2825.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2826.         else

  2827.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2828.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2829. 

  2830.         if (flags & SWS_CPU_CAPS_MMX2)

  2831.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2832.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2833.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2834.         else if (flags & SWS_CPU_CAPS_MMX)

  2835.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2836.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2837.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2838.         else

  2839.             av_log(c, AV_LOG_INFO, "using C\n");

  2840.     }

  2841. 

  2842.     if (flags & SWS_PRINT_INFO)

  2843.     {

  2844.         if (flags & SWS_CPU_CAPS_MMX)

  2845.         {

  2846.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2847.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2848.             else

  2849.             {

  2850.                 if (c->hLumFilterSize==4)

  2851.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2852.                 else if (c->hLumFilterSize==8)

  2853.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2854.                 else

  2855.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2856. 

  2857.                 if (c->hChrFilterSize==4)

  2858.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2859.                 else if (c->hChrFilterSize==8)

  2860.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2861.                 else

  2862.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2863.             }

  2864.         }

  2865.         else

  2866.         {

  2867. #if ARCH_X86

  2868.             av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n");

  2869. #else

  2870.             if (flags & SWS_FAST_BILINEAR)

  2871.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2872.             else

  2873.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2874. #endif

  2875.         }

  2876.         if (isPlanarYUV(dstFormat))

  2877.         {

  2878.             if (c->vLumFilterSize==1)

  2879.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2880.             else

  2881.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2882.         }

  2883.         else

  2884.         {

  2885.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2886.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2887.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2888.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2889.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2890.             else

  2891.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2892.         }

  2893. 

  2894.         if (dstFormat==PIX_FMT_BGR24)

  2895.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n",

  2896.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2897.         else if (dstFormat==PIX_FMT_RGB32)

  2898.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2899.         else if (dstFormat==PIX_FMT_BGR565)

  2900.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2901.         else if (dstFormat==PIX_FMT_BGR555)

  2902.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2903. 

  2904.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2905.     }

  2906.     if (flags & SWS_PRINT_INFO)

  2907.     {

  2908.         av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2909.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2910.         av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2911.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2912.     }

  2913. 

  2914.     c->swScale= getSwsFunc(c);

  2915.     return c;

  2916. }

  2917. 

  2918. static void reset_ptr(uint8_t* src[], int format){

  2919.     if(!isALPHA(format))

  2920.         src[3]=NULL;

  2921.     if(!isPlanarYUV(format)){

  2922.         src[3]=src[2]=NULL;

  2923.         if(   format != PIX_FMT_PAL8

  2924.            && format != PIX_FMT_RGB8

  2925.            && format != PIX_FMT_BGR8

  2926.            && format != PIX_FMT_RGB4_BYTE

  2927.            && format != PIX_FMT_BGR4_BYTE

  2928.           )

  2929.             src[1]= NULL;

  2930.     }

  2931. }

  2932. 

  2933. /**

  2934.  * swscale wrapper, so we don't need to export the SwsContext.

  2935.  * Assumes planar YUV to be in YUV order instead of YVU.

  2936.  */

  2937. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2938.               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2939.     int i;

  2940.     uint8_t* src2[4]= {src[0], src[1], src[2], src[3]};

  2941.     uint8_t* dst2[4]= {dst[0], dst[1], dst[2], dst[3]};

  2942. 

  2943.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2944.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2945.         return 0;

  2946.     }

  2947.     if (c->sliceDir == 0) {

  2948.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2949.     }

  2950. 

  2951.     if (usePal(c->srcFormat)){

  2952.         for (i=0; i<256; i++){

  2953.             int p, r, g, b,y,u,v;

  2954.             if(c->srcFormat == PIX_FMT_PAL8){

  2955.                 p=((uint32_t*)(src[1]))[i];

  2956.                 r= (p>>16)&0xFF;

  2957.                 g= (p>> 8)&0xFF;

  2958.                 b=  p     &0xFF;

  2959.             }else if(c->srcFormat == PIX_FMT_RGB8){

  2960.                 r= (i>>5    )*36;

  2961.                 g= ((i>>2)&7)*36;

  2962.                 b= (i&3     )*85;

  2963.             }else if(c->srcFormat == PIX_FMT_BGR8){

  2964.                 b= (i>>6    )*85;

  2965.                 g= ((i>>3)&7)*36;

  2966.                 r= (i&7     )*36;

  2967.             }else if(c->srcFormat == PIX_FMT_RGB4_BYTE){

  2968.                 r= (i>>3    )*255;

  2969.                 g= ((i>>1)&3)*85;

  2970.                 b= (i&1     )*255;

  2971.             }else {

  2972.                 assert(c->srcFormat == PIX_FMT_BGR4_BYTE);

  2973.                 b= (i>>3    )*255;

  2974.                 g= ((i>>1)&3)*85;

  2975.                 r= (i&1     )*255;

  2976.             }

  2977.             y= av_clip_uint8((RY*r + GY*g + BY*b + ( 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2978.             u= av_clip_uint8((RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2979.             v= av_clip_uint8((RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2980.             c->pal_yuv[i]= y + (u<<8) + (v<<16);

  2981. 

  2982. 

  2983.             switch(c->dstFormat) {

  2984.             case PIX_FMT_BGR32:

  2985. #ifndef WORDS_BIGENDIAN

  2986.             case PIX_FMT_RGB24:

  2987. #endif

  2988.                 c->pal_rgb[i]=  r + (g<<8) + (b<<16);

  2989.                 break;

  2990.             case PIX_FMT_BGR32_1:

  2991. #ifdef  WORDS_BIGENDIAN

  2992.             case PIX_FMT_BGR24:

  2993. #endif

  2994.                 c->pal_rgb[i]= (r + (g<<8) + (b<<16)) << 8;

  2995.                 break;

  2996.             case PIX_FMT_RGB32_1:

  2997. #ifdef  WORDS_BIGENDIAN

  2998.             case PIX_FMT_RGB24:

  2999. #endif

  3000.                 c->pal_rgb[i]= (b + (g<<8) + (r<<16)) << 8;

  3001.                 break;

  3002.             case PIX_FMT_RGB32:

  3003. #ifndef WORDS_BIGENDIAN

  3004.             case PIX_FMT_BGR24:

  3005. #endif

  3006.             default:

  3007.                 c->pal_rgb[i]=  b + (g<<8) + (r<<16);

  3008.             }

  3009.         }

  3010.     }

  3011. 

  3012.     // copy strides, so they can safely be modified

  3013.     if (c->sliceDir == 1) {

  3014.         // slices go from top to bottom

  3015.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2], srcStride[3]};

  3016.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2], dstStride[3]};

  3017. 

  3018.         reset_ptr(src2, c->srcFormat);

  3019.         reset_ptr(dst2, c->dstFormat);

  3020. 

  3021.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2, dstStride2);

  3022.     } else {

  3023.         // slices go from bottom to top => we flip the image internally

  3024.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2], -srcStride[3]};

  3025.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2], -dstStride[3]};

  3026. 

  3027.         src2[0] += (srcSliceH-1)*srcStride[0];

  3028.         if (!usePal(c->srcFormat))

  3029.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  3030.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  3031.         src2[3] += (srcSliceH-1)*srcStride[3];

  3032.         dst2[0] += ( c->dstH                      -1)*dstStride[0];

  3033.         dst2[1] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1];

  3034.         dst2[2] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2];

  3035.         dst2[3] += ( c->dstH                      -1)*dstStride[3];

  3036. 

  3037.         reset_ptr(src2, c->srcFormat);

  3038.         reset_ptr(dst2, c->dstFormat);

  3039. 

  3040.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  3041.     }

  3042. }

  3043. 

  3044. #if LIBSWSCALE_VERSION_MAJOR < 1

  3045. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  3046.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  3047.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  3048. }

  3049. #endif

  3050. 

  3051. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  3052.                                 float lumaSharpen, float chromaSharpen,

  3053.                                 float chromaHShift, float chromaVShift,

  3054.                                 int verbose)

  3055. {

  3056.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  3057. 

  3058.     if (lumaGBlur!=0.0){

  3059.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  3060.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  3061.     }else{

  3062.         filter->lumH= sws_getIdentityVec();

  3063.         filter->lumV= sws_getIdentityVec();

  3064.     }

  3065. 

  3066.     if (chromaGBlur!=0.0){

  3067.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  3068.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  3069.     }else{

  3070.         filter->chrH= sws_getIdentityVec();

  3071.         filter->chrV= sws_getIdentityVec();

  3072.     }

  3073. 

  3074.     if (chromaSharpen!=0.0){

  3075.         SwsVector *id= sws_getIdentityVec();

  3076.         sws_scaleVec(filter->chrH, -chromaSharpen);

  3077.         sws_scaleVec(filter->chrV, -chromaSharpen);

  3078.         sws_addVec(filter->chrH, id);

  3079.         sws_addVec(filter->chrV, id);

  3080.         sws_freeVec(id);

  3081.     }

  3082. 

  3083.     if (lumaSharpen!=0.0){

  3084.         SwsVector *id= sws_getIdentityVec();

  3085.         sws_scaleVec(filter->lumH, -lumaSharpen);

  3086.         sws_scaleVec(filter->lumV, -lumaSharpen);

  3087.         sws_addVec(filter->lumH, id);

  3088.         sws_addVec(filter->lumV, id);

  3089.         sws_freeVec(id);

  3090.     }

  3091. 

  3092.     if (chromaHShift != 0.0)

  3093.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  3094. 

  3095.     if (chromaVShift != 0.0)

  3096.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  3097. 

  3098.     sws_normalizeVec(filter->chrH, 1.0);

  3099.     sws_normalizeVec(filter->chrV, 1.0);

  3100.     sws_normalizeVec(filter->lumH, 1.0);

  3101.     sws_normalizeVec(filter->lumV, 1.0);

  3102. 

  3103.     if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);

  3104.     if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);

  3105. 

  3106.     return filter;

  3107. }

  3108. 

  3109. SwsVector *sws_getGaussianVec(double variance, double quality){

  3110.     const int length= (int)(variance*quality + 0.5) | 1;

  3111.     int i;

  3112.     double *coeff= av_malloc(length*sizeof(double));

  3113.     double middle= (length-1)*0.5;

  3114.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3115. 

  3116.     vec->coeff= coeff;

  3117.     vec->length= length;

  3118. 

  3119.     for (i=0; i<length; i++)

  3120.     {

  3121.         double dist= i-middle;

  3122.         coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  3123.     }

  3124. 

  3125.     sws_normalizeVec(vec, 1.0);

  3126. 

  3127.     return vec;

  3128. }

  3129. 

  3130. SwsVector *sws_getConstVec(double c, int length){

  3131.     int i;

  3132.     double *coeff= av_malloc(length*sizeof(double));

  3133.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3134. 

  3135.     vec->coeff= coeff;

  3136.     vec->length= length;

  3137. 

  3138.     for (i=0; i<length; i++)

  3139.         coeff[i]= c;

  3140. 

  3141.     return vec;

  3142. }

  3143. 

  3144. 

  3145. SwsVector *sws_getIdentityVec(void){

  3146.     return sws_getConstVec(1.0, 1);

  3147. }

  3148. 

  3149. double sws_dcVec(SwsVector *a){

  3150.     int i;

  3151.     double sum=0;

  3152. 

  3153.     for (i=0; i<a->length; i++)

  3154.         sum+= a->coeff[i];

  3155. 

  3156.     return sum;

  3157. }

  3158. 

  3159. void sws_scaleVec(SwsVector *a, double scalar){

  3160.     int i;

  3161. 

  3162.     for (i=0; i<a->length; i++)

  3163.         a->coeff[i]*= scalar;

  3164. }

  3165. 

  3166. void sws_normalizeVec(SwsVector *a, double height){

  3167.     sws_scaleVec(a, height/sws_dcVec(a));

  3168. }

  3169. 

  3170. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  3171.     int length= a->length + b->length - 1;

  3172.     double *coeff= av_malloc(length*sizeof(double));

  3173.     int i, j;

  3174.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3175. 

  3176.     vec->coeff= coeff;

  3177.     vec->length= length;

  3178. 

  3179.     for (i=0; i<length; i++) coeff[i]= 0.0;

  3180. 

  3181.     for (i=0; i<a->length; i++)

  3182.     {

  3183.         for (j=0; j<b->length; j++)

  3184.         {

  3185.             coeff[i+j]+= a->coeff[i]*b->coeff[j];

  3186.         }

  3187.     }

  3188. 

  3189.     return vec;

  3190. }

  3191. 

  3192. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  3193.     int length= FFMAX(a->length, b->length);

  3194.     double *coeff= av_malloc(length*sizeof(double));

  3195.     int i;

  3196.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3197. 

  3198.     vec->coeff= coeff;

  3199.     vec->length= length;

  3200. 

  3201.     for (i=0; i<length; i++) coeff[i]= 0.0;

  3202. 

  3203.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  3204.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  3205. 

  3206.     return vec;

  3207. }

  3208. 

  3209. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  3210.     int length= FFMAX(a->length, b->length);

  3211.     double *coeff= av_malloc(length*sizeof(double));

  3212.     int i;

  3213.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3214. 

  3215.     vec->coeff= coeff;

  3216.     vec->length= length;

  3217. 

  3218.     for (i=0; i<length; i++) coeff[i]= 0.0;

  3219. 

  3220.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  3221.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  3222. 

  3223.     return vec;

  3224. }

  3225. 

  3226. /* shift left / or right if "shift" is negative */

  3227. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  3228.     int length= a->length + FFABS(shift)*2;

  3229.     double *coeff= av_malloc(length*sizeof(double));

  3230.     int i;

  3231.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3232. 

  3233.     vec->coeff= coeff;

  3234.     vec->length= length;

  3235. 

  3236.     for (i=0; i<length; i++) coeff[i]= 0.0;

  3237. 

  3238.     for (i=0; i<a->length; i++)

  3239.     {

  3240.         coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  3241.     }

  3242. 

  3243.     return vec;

  3244. }

  3245. 

  3246. void sws_shiftVec(SwsVector *a, int shift){

  3247.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  3248.     av_free(a->coeff);

  3249.     a->coeff= shifted->coeff;

  3250.     a->length= shifted->length;

  3251.     av_free(shifted);

  3252. }

  3253. 

  3254. void sws_addVec(SwsVector *a, SwsVector *b){

  3255.     SwsVector *sum= sws_sumVec(a, b);

  3256.     av_free(a->coeff);

  3257.     a->coeff= sum->coeff;

  3258.     a->length= sum->length;

  3259.     av_free(sum);

  3260. }

  3261. 

  3262. void sws_subVec(SwsVector *a, SwsVector *b){

  3263.     SwsVector *diff= sws_diffVec(a, b);

  3264.     av_free(a->coeff);

  3265.     a->coeff= diff->coeff;

  3266.     a->length= diff->length;

  3267.     av_free(diff);

  3268. }

  3269. 

  3270. void sws_convVec(SwsVector *a, SwsVector *b){

  3271.     SwsVector *conv= sws_getConvVec(a, b);

  3272.     av_free(a->coeff);

  3273.     a->coeff= conv->coeff;

  3274.     a->length= conv->length;

  3275.     av_free(conv);

  3276. }

  3277. 

  3278. SwsVector *sws_cloneVec(SwsVector *a){

  3279.     double *coeff= av_malloc(a->length*sizeof(double));

  3280.     int i;

  3281.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3282. 

  3283.     vec->coeff= coeff;

  3284.     vec->length= a->length;

  3285. 

  3286.     for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  3287. 

  3288.     return vec;

  3289. }

  3290. 

  3291. void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level){

  3292.     int i;

  3293.     double max=0;

  3294.     double min=0;

  3295.     double range;

  3296. 

  3297.     for (i=0; i<a->length; i++)

  3298.         if (a->coeff[i]>max) max= a->coeff[i];

  3299. 

  3300.     for (i=0; i<a->length; i++)

  3301.         if (a->coeff[i]<min) min= a->coeff[i];

  3302. 

  3303.     range= max - min;

  3304. 

  3305.     for (i=0; i<a->length; i++)

  3306.     {

  3307.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  3308.         av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);

  3309.         for (;x>0; x--) av_log(log_ctx, log_level, " ");

  3310.         av_log(log_ctx, log_level, "|\n");

  3311.     }

  3312. }

  3313. 

  3314. #if LIBSWSCALE_VERSION_MAJOR < 1

  3315. void sws_printVec(SwsVector *a){

  3316.     sws_printVec2(a, NULL, AV_LOG_DEBUG);

  3317. }

  3318. #endif

  3319. 

  3320. void sws_freeVec(SwsVector *a){

  3321.     if (!a) return;

  3322.     av_freep(&a->coeff);

  3323.     a->length=0;

  3324.     av_free(a);

  3325. }

  3326. 

  3327. void sws_freeFilter(SwsFilter *filter){

  3328.     if (!filter) return;

  3329. 

  3330.     if (filter->lumH) sws_freeVec(filter->lumH);

  3331.     if (filter->lumV) sws_freeVec(filter->lumV);

  3332.     if (filter->chrH) sws_freeVec(filter->chrH);

  3333.     if (filter->chrV) sws_freeVec(filter->chrV);

  3334.     av_free(filter);

  3335. }

  3336. 

  3337. 

  3338. void sws_freeContext(SwsContext *c){

  3339.     int i;

  3340.     if (!c) return;

  3341. 

  3342.     if (c->lumPixBuf)

  3343.     {

  3344.         for (i=0; i<c->vLumBufSize; i++)

  3345.             av_freep(&c->lumPixBuf[i]);

  3346.         av_freep(&c->lumPixBuf);

  3347.     }

  3348. 

  3349.     if (c->chrPixBuf)

  3350.     {

  3351.         for (i=0; i<c->vChrBufSize; i++)

  3352.             av_freep(&c->chrPixBuf[i]);

  3353.         av_freep(&c->chrPixBuf);

  3354.     }

  3355. 

  3356.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){

  3357.         for (i=0; i<c->vLumBufSize; i++)

  3358.             av_freep(&c->alpPixBuf[i]);

  3359.         av_freep(&c->alpPixBuf);

  3360.     }

  3361. 

  3362.     av_freep(&c->vLumFilter);

  3363.     av_freep(&c->vChrFilter);

  3364.     av_freep(&c->hLumFilter);

  3365.     av_freep(&c->hChrFilter);

  3366. #if HAVE_ALTIVEC

  3367.     av_freep(&c->vYCoeffsBank);

  3368.     av_freep(&c->vCCoeffsBank);

  3369. #endif

  3370. 

  3371.     av_freep(&c->vLumFilterPos);

  3372.     av_freep(&c->vChrFilterPos);

  3373.     av_freep(&c->hLumFilterPos);

  3374.     av_freep(&c->hChrFilterPos);

  3375. 

  3376. #if ARCH_X86 && CONFIG_GPL

  3377. #ifdef MAP_ANONYMOUS

  3378.     if (c->funnyYCode ) munmap(c->funnyYCode , MAX_FUNNY_CODE_SIZE);

  3379.     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  3380. #elif HAVE_VIRTUALALLOC

  3381.     if (c->funnyYCode ) VirtualFree(c->funnyYCode , MAX_FUNNY_CODE_SIZE, MEM_RELEASE);

  3382.     if (c->funnyUVCode) VirtualFree(c->funnyUVCode, MAX_FUNNY_CODE_SIZE, MEM_RELEASE);

  3383. #else

  3384.     av_free(c->funnyYCode );

  3385.     av_free(c->funnyUVCode);

  3386. #endif

  3387.     c->funnyYCode=NULL;

  3388.     c->funnyUVCode=NULL;

  3389. #endif /* ARCH_X86 && CONFIG_GPL */

  3390. 

  3391.     av_freep(&c->lumMmx2Filter);

  3392.     av_freep(&c->chrMmx2Filter);

  3393.     av_freep(&c->lumMmx2FilterPos);

  3394.     av_freep(&c->chrMmx2FilterPos);

  3395.     av_freep(&c->yuvTable);

  3396. 

  3397.     av_free(c);

  3398. }

  3399. 

  3400. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  3401.                                         int srcW, int srcH, enum PixelFormat srcFormat,

  3402.                                         int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  3403.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  3404. {

  3405.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  3406. 

  3407.     if (!param)

  3408.         param = default_param;

  3409. 

  3410.     if (context) {

  3411.         if (context->srcW != srcW || context->srcH != srcH ||

  3412.             context->srcFormat != srcFormat ||

  3413.             context->dstW != dstW || context->dstH != dstH ||

  3414.             context->dstFormat != dstFormat || context->flags != flags ||

  3415.             context->param[0] != param[0] || context->param[1] != param[1])

  3416.         {

  3417.             sws_freeContext(context);

  3418.             context = NULL;

  3419.         }

  3420.     }

  3421.     if (!context) {

  3422.         return sws_getContext(srcW, srcH, srcFormat,

  3423.                               dstW, dstH, dstFormat, flags,

  3424.                               srcFilter, dstFilter, param);

  3425.     }

  3426.     return context;

  3427. }